記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：IS&T & SPIE  

A simple and practical technique is presented for creating fine three-dimensional (3D) images with polygon-based computer-generated holograms. The polygon-based method is a technique for computing the optical wave-field of virtual 3D scenes given by a numerical model. The presented method takes less computation time than common point-source methods and produces fine spatial 3D images of deep 3D scenes that convey a strong sensation of depth, unlike conventional 3D systems providing only binocular disparity. However, smooth surfaces cannot be reconstructed using the presented method because the surfaces are approximated by planar polygons. This problem is resolved by introducing a simple rendering technique that is almost the same as that in common computer graphics, since the polygon-based method has similarity to rendering techniques in computer graphics. Two actual computer holograms are presented to verify and demonstrate the proposed technique. One is a hologram of a live face whose shape is measured using a 3D laser scanner that outputs polygon-mesh data. The other is for a scene including the moon. Both are created employing the proposed rendering techniques of the texture mapping of real photographs and smooth shading. (C) 2012 SPIE and IS&T. [DOI: 10.1117/1.JEI.21.2.023002]

DOI： 10.1117/1.JEI.21.2.023002

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：OPTICAL SOC AMER  

Recent developments in computer algorithms, image sensors, and microfabrication technologies make it possible to digitize the whole process of classical holography. This technique, referred to as digitized holography, allows us to create fine spatial three-dimensional (3D) images composed of virtual and real objects. In the technique, the wave field of real objects is captured in a wide area and at very high resolution using the technique of synthetic aperture digital holography. The captured field is incorporated in virtual 3D scenes including two-dimensional digital images and 3D polygon mesh objects. The synthetic field is optically reconstructed using the technique of computer-generated holograms. The reconstructed 3D images present all depth cues like classical holograms but are digitally editable, archivable, and transmittable unlike classical holograms. The synthetic hologram printed by a laser lithography system has a wide viewing zone in full-parallax and give viewers a strong sensation of depth, which has never been achieved by conventional 3D systems. A real hologram as well as the details of the technique is presented to verify the proposed technique. (C) 2011 Optical Society of America

DOI： 10.1364/AO.50.00H278

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：OPTICAL SOC AMER  

A technique is presented for realistic rendering in polygon-based computer-generated holograms (CGHs). In this technique, the spatial spectrum of the reflected light is modified to imitate specular reflection. The spectral envelopes of the reflected light are fitted to a spectral shape based on the Phong reflection model used in computer graphics. The technique features fast computation of the field of objects, composed of many specular polygons, and is applicable to creating high-definition CGHs with several billions of pixels. An actual high-definition CGH is created using the proposed technique and is demonstrated for verification of the optical reconstruction of specular surfaces. (C) 2011 Optical Society of America

DOI： 10.1364/AO.50.00H245

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：OPTICAL SOC AMER  

A large-scale full-parallax computer-generated hologram (CGH) with four billion (2(16) x 2(16)) pixels is created to reconstruct a fine true 3D image of a scene, with occlusions. The polygon-based method numerically generates the object field of a surface object, whose shape is provided by a set of vertex data of polygonal facets, while the silhouette method makes it possible to reconstruct the occluded scene. A novel technique using the segmented frame buffer is presented for handling and propagating large wave fields even in the case where the whole wave field cannot be stored in memory. We demonstrate that the full-parallax CGH, calculated by the proposed method and fabricated by a laser lithography system, reconstructs a fine 3D image accompanied by a strong sensation of depth. (C) 2009 Optical Society of America

DOI： 10.1364/AO.48.000H54

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：OPTICAL SOC AMER  

Rotational transformation based on coordinate rotation in Fourier space is a useful technique for simulating wave field propagation between nonparallel planes. This technique is characterized by fast computation because the transformation only requires executing a fast Fourier transform twice and a single interpolation. It is proved that the formula of the rotational transformation mathematically satisfies the Helmholtz equation. Moreover, to verify the formulation and its usefulness in wave optics, it is also demonstrated that the transformation makes it possible to reconstruct an image on arbitrarily tilted planes from a wave field captured experimentally by using digital holography. (c) 2008 Optical Society of America.

DOI： 10.1364/AO.47.00D110

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担当区分：筆頭著者,　最終著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：OPTICAL SOC AMER  

Digitally synthetic holograms of surface model objects are investigated for reconstructing three-dimensional objects with shade and texture. The objects in the proposed techniques are composed of planar surfaces, and a property function defined for each surface provides shape and texture. The field emitted from each surface is independently calculated by a method based on rotational transformation of the property function by use of a fast Fourier transform (FFT) and totaled on the hologram. This technique has led to a reduction in computational cost: FFT operation is required only once for calculating a surface. In addition, another technique based on a theoretical model of the brightness of the reconstructed surfaces enables us to shade the surface of a reconstructed object as designed. Optical reconstructions of holograms synthesized by the proposed techniques are demonstrated. (c) 2005 Optical Society of America.

DOI： 10.1364/AO.44.004607

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掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：ACM  

DOI： 10.1145/3610543.3626182

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掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：ACM  

DOI： 10.1145/3550082.3564162

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：OSA - The Optical Society  

In the calculation of large-scale computer-generated holograms, an approach called “tiling,” which divides the hologram plane into small rectangles, is often employed due to limitations on computational memory. However, the total amount of computational complexity severely increases with the number of divisions. In this paper, we propose an efficient method for calculating tiled large-scale holograms using ray-wavefront conversion. In experiments, the effectiveness of the proposed method was verified by comparing its calculation cost with that using the previous method. Additionally, a hologram of 128K × 128K pixels was calculated and fabricated by a laser-lithography system, and a high-quality 105 mm × 105 mm 3D image including complicated reflection and translucency was optically reconstructed.

DOI： 10.1364/OE.26.010773

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.optcom.2017.11.066

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その他リンク： https://dblp.uni-trier.de/db/journals/corr/corr1708.html#abs-1708-04233

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：OPTICAL SOC AMER  

We present an algorithm for reconstructing an object complex field with resolution below that of an image sensor (subpixel resolution) in single-shot diffractive imaging with coded diffraction. The algorithm employs subpixel phase retrieval and sparse regularization based on compressive sensing. This is useful for high-speed or high-sensitivity imaging using an image sensor with a low pixel count and/or a large pixel size. We experimentally demonstrated the proposed method with two types of moving objects. (C) 2017 Optical Society of America

DOI： 10.1364/AO.56.007642

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：SPIE-INT SOC OPTICAL ENGINEERING  

Several full-color high-definition CGHs are created for reconstructing 3D scenes including real-existing physical objects. The field of the physical objects are generated or captured by employing three techniques; 3D scanner, synthetic aperture digital holography, and multi-viewpoint images. Full-color reconstruction of high-definition CGHs is realized by RGB color filters. The optical reconstructions are presented for verifying these techniques.

DOI： 10.1117/12.2265798

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：SPIE-INT SOC OPTICAL ENGINEERING  

High-definition CGHs can reconstruct high-quality 3D images that are comparable to that in conventional optical holography. However, it was difficult to exhibit full-color images reconstructed by these high-definition CGHs, because three CGHs for RGB colors and a bulky image combiner were needed to produce full-color images. Recently, we reported a novel technique for full-color reconstruction using RGB color filters, which are similar to that used for liquid-crystal panels. This technique allows us to produce full-color high-definition CGHs composed of a single plate and place them on exhibition. By using the technique, we demonstrate full-color CGHs that reconstruct hybrid scenes comprised of real-existing physical objects and CG-modeled virtual objects in this paper. Here, the wave field of the physical object are obtained from dense multi-viewpoint images by employing the ray-sampling (RS) plane technique. In addition to the technique for full-color capturing and reconstruction of real object fields, the principle and simulation technique for full-color CGHs using RGB color filters are presented.

DOI： 10.1117/12.2251414

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：SPIE-INT SOC OPTICAL ENGINEERING  

We propose a fast calculation method to synthesize a computer-generated hologram (CGH) of realistic deep threedimensional (3D) scene. In our previous study, we have proposed a calculation method of CGH for reproducing such scene called ray-sampling-plane (RSP) method, in which light-ray information of a scene is converted to wavefront, and the wavefront is numerically propagated based on diffraction theory. In this paper, we introduce orthographic projection to the RSP method for accelerating calculation time. By numerical experiments, we verified the accelerated calculation with the ratio of 28-times compared to the conventional RSP method. The calculated CGH was fabricated by the printing system using laser lithography and demonstrated deep 3D image reconstruction in 52mmx52mm with realistic appearance effect such as gloss and translucent effect.

DOI： 10.1117/12.2212301

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：SPIE  

We propose a technique for optimization of design-wavelengths in trichromatic computer holography. Full color reconstruction of high-definition computer-generated holograms (CGH) is simply realized by combining three primary color images reconstructed by three CGHs. However, chromatic aberrations occur in the reconstruction, because incoherent light sources such as LED are commonly used for the illumination. Since these chromatic aberrations change dependently on the design-wavelengths of CGHs as well as the shape of illumination spectra, optimization techniques based on simulated reconstruction of CGHs is presented to obtain the most unobtrusive color aberration from spectra specific to the light source.

DOI： 10.1117/12.2076876

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：SPIE-INT SOC OPTICAL ENGINEERING  

Several techniques are introduced and reviewed in high-definition computer holography. The reconstructed object is usually CG-modeled virtual objects, but it is possible to digitally record light of physical objects and reconstruct it by the high-definition computer-generated hologram. The process can be considered as a sort of digital signal processing of light.

DOI： 10.1117/12.2188046

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：SPIE-INT SOC OPTICAL ENGINEERING  

A method called the switch-back technique allows us to drastically reduce computation time of occlusionprocessing based on the polygon-by-polygon silhouette light-shielding. It is also reported that further reduction of computation time can be achieved by splitting an object to some sub-models along with depth direction. However, computational cost for numerical propagation between the sub-models increases with increasing the number of sub-models. As a result, there is an optimum number of sub-models. In this paper, we propose a technique to predict the optimum number of sub-models by estimating the total computational complexity of the switch-back technique with object splitting.

DOI： 10.1117/12.2075998

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：SPIE-INT SOC OPTICAL ENGINEERING  

Several techniques are reviewed in high-definition computer holography. These techniques are based on numerical techniques in wave optics. For example, the polygon-based method based on propagation between tilted planes is used for calculating the field of polygonal surface sources of light. Numerical propagation of large-scaled field is also implemented by using the technique of off-axis propagation. The silhouette method for occlusion processing is based on the angular spectrum method for propagation between parallel planes. The relation between computer holography and computational optics are presented and several high-definition CGHs using these techniques are demonstrated for verifying the techniques.

DOI： 10.1117/12.2197470

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：IEEE  

In this paper, a new technique for occlusion processing is proposed in computer holography. The new technique based on the silhouette method is very fast as compared with the conventional methods. This technique allows us to remove hidden-surfaces of self-occlude objects and makes it possible to reconstruct fine spatial 3D images that are comparable to that in classical holography. The performance and optical reconstruction is reported.

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：SPIE-INT SOC OPTICAL ENGINEERING  

The wavefront printer is an equipment to produce computer-generated holograms (CGH) as a volume hologram. This printer records the wavefront generated by spatial light modulator (SLM). We propose a novel technique for applying phase-only SLM to the wavefront printer without losing the advantage of the wide space-band product of phase modulation. The phase-only SLM commonly has the problem of degradation of generated wavefronts because of coding noise due to phase only modulation. To reduce the noise, a technique is presented in order to partially modulate amplitude of recording light in phase-only SLM.

DOI： 10.1117/12.2039174

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：SPIE-INT SOC OPTICAL ENGINEERING  

High-definition computer holography based on the polygon-based method commonly uses the silhouette method to shield light behind objects for hidden surface removal. However, the light-shielding is not perfect and causes leakage light passing through many gaps between silhouette-shaped masks. Although we have proposed the principle of more rigorous technique to remove the leakage light, the technique has never been applied to the actual high-definition computer holography because of its long computation time. We propose some techniques to reduce the computation time and apply the rigorous technique to high-definition computer holography. A CGH created by the proposed method is demonstrated.

DOI： 10.1117/12.2039216

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記述言語：日本語   出版者・発行元：一般社団法人電子情報通信学会  

電子ディスプレイデバイスによってホログラフィを再生する電子ホログラフィの問題点として,デバイスの解像度が古典的なホログラムと比較して圧倒的に低いことが挙げられる.この問題を緩和する一つの方法として,高フレームレートのデバイスを用いて再生像を時分割多重化する手法を提案している.提案手法では,高速応答が可能なレーザダイオード(LD)光源のスイッチングにより,従来法のような複雑な光学系や可動部品を用いずに,再生像の時分割多重化を行い,解像度を拡大することができる.提案手法の原理確認のために空間光変調器(SLM)を用いて試作した,解像度を約4倍に拡大したディスプレイシステムを報告している.

CiNii Books

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：IOP PUBLISHING LTD  

Our recent works of high-definition computer-generated holograms (CGH) and the techniques used for the creation, such as the polygon-based method, silhouette method and digitized holography, are summarized and reviewed in this paper. The concept of computer holography is proposed in terms of integrating and crystalizing the techniques into novel digital art.

DOI： 10.1088/1742-6596/415/1/012053

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記述言語：日本語   出版者・発行元：公益社団法人 精密工学会  

計算機合成ホログラム（CGH）の作製において、視域を広げるためには再生像の回折角を大きくする必要があり、このホログラムの干渉縞の空間周波数は500本/mm以上にすることが求められている。この要求を満たすためには、描画ピクセルの単位をサブμmにする必要が迫られる。我々はレーザ直接描画装置とAZ1350フォトレジストマスク基板を用い、640nm×800nmのピクセルで構成されたCGHを作製し、条件を満たす再生像を得た。

DOI： 10.11522/pscjspe.2013A.0.291.0

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

The angular spectrum method (ASM) calculates diffraction calculation in a high numerical aperture, unlike Fresnel diffraction. However, this method does not allow us to calculate at different sampling rates on source and destination planes. In this Letter, we propose a scaled ASM that calculates diffraction at different sampling rates on source and destination planes using the nonuniform fast Fourier transform. © 2012 Optical Society of America.

DOI： 10.1364/OL.37.004128

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記述言語：日本語   出版者・発行元：レーザー学会  

DOI： 10.2184/lsj.40.18

CiNii Books

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：SPIE-INT SOC OPTICAL ENGINEERING  

Novel techniques is proposed for rendering specular smooth surfaces in polygon-based computer holography that features reconstruction of fine 3D images accompanied with strong sensation of depth. The technique is an improvement of the conventional technique for rendering flat specular surfaces. In this technique, phase distribution that works as a diffuser is divided into small rectangular segments and the reflection direction is controlled for each segment. In addition, this new method increases freedom for lighting the object. Two high-definition CGHs are calculated by the proposed method. One of them is fabricated and demonstrated for verifying the technique.

DOI： 10.1117/12.908871

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記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3169/itej.66.J136

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：SPIE-INT SOC OPTICAL ENGINEERING  

Image-type binary CGHs, fabricated by a laser lithography system, commonly lost the object shading and texture. This is caused by the binary amplitude fringe that is unable to reconstruct object brightness because amplitude information of the object field is removed by binarization if the object is too close to the hologram. In this paper, optimized error diffusion is applied to encoding binary-amplitude image-type CGHs in order to improve reconstruction of surface shading and texture. An actual image-type high-definition CGHs is created by the proposed technique and demonstrated to verify that the CGHs can be reconstructed by white light source without much chromatic aberration.

DOI： 10.1117/12.908353

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記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3169/itej.65.1793

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：SPIE-INT SOC OPTICAL ENGINEERING  

Four novel techniques are introduced into polygon-based high-definition CGHs (PBHD-CGH) that feature the true-fine spatial 3D image accompanied with a strong sensation of depth. The first is algorithm for creating specular surfaces based on Phong reflection model. This is very useful for providing a feel of material to polygonal surfaces. The second technique is called digitized holography that replaces the entire processes of classical holography by their digital counterparts. The wave-field of real-existent objects can be optically reconstructed by the digitized holography. This technique makes it possible to edit the 3D scene of holograms or create mixed 3D scene of the real and virtual objects. Another technique for creating PBHD-CGH of real-existent objects is also proposed by a CG-like method using a 3D laser scanner that measures the 3D shape of the object. Finally, a prototype PBHD-CGH is demonstrated for creating landscape scenery. This CGH is intended to reconstruct a scene as if the viewers see mountain scenery through the window given by the CGH.

DOI： 10.1117/12.876362

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記述言語：日本語   出版者・発行元：一般社団法人 映像情報メディア学会  

ポリゴン法を用いることでギガピクセル規模の超高解像度CGHを比較的短い時間で計算できるようになってきている.しかし,自己オクルージョンを多数含む物体モデルに対して適切な隠面消去を施す場合には計算量が増大し,計算が長時間化し大規模化が困難になる問題が生じる.そこで,隠面消去を含む物体光波合成処理を分散並列処理することで超高解像度CGHの計算時間の短縮と大規模化を試みた.

DOI： 10.11485/itetr.35.35.0_9

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記述言語：日本語   出版者・発行元：一般社団法人 映像情報メディア学会  

ポリゴン法とレーザーリソグラフィを用いた超高解像度CGHでは,従来,フレネル型ホログラムが作成されていた.これは,2値振幅変調ホログラムであるため,イメージ型を作成すると陰影が再生されない問題が生じるためであった.本研究では,拡散係数を修正する最適化誤差拡散法を用いて干渉縞を2値化することにより,再生像品質と陰影の再現性を向上させ,白色光再生が可能なホログラムの作成を試みた.

DOI： 10.11485/itetr.35.35.0_13

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記述言語：日本語   出版者・発行元：一般社団法人 映像情報メディア学会  

電子ホログラフィにおいて,LD光源をスイッチングすることによりSLM照明光源の時分割多重化を行い,水平方向視域角を拡大する手法を提案している.試作したシステムでは,4個のLD光源で時分割再生を行うことにより複雑な光学系や可動部品を用いずに1台の位相型SLMの水平方向視域角を4倍に拡大している.このディスプレイを用いてポリゴン法により計算した動画ホログラムを再生した結果,両眼で良好な再生像を確認することができた.

DOI： 10.11485/itetr.35.42.0_23

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記述言語：日本語   出版者・発行元：一般社団法人 映像情報メディア学会  

ポリゴン法CGHにおいて透明物体をレンダリングする手法が提案されている。この手法では光の屈折を波動光学的に取扱い、物体を切断した近似モデルを用いてポリゴン単位で光波の屈折現象を計算することで透明物体の光波を計算している。この手法で計算したCGHのシミュレーション再生像が示されている。

DOI： 10.11485/itetr.35.42.0_27

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：IEEE  

A novel method named digitized holography is proposed for 3D display systems. This is the technique replacing the whole process of classical holography with digital processing of optical wave-fields. The digitized holography allows us to edit holograms and reconstruct spatial 3D images including real-existent objects and CG-modeled virtual objects.

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記述言語：日本語   出版者・発行元：一般社団法人 映像情報メディア学会  

ポリゴン法を用いて作製した超解像度CGHは、強い奥行き感を感じる完全な3D立体像を再生できる。しかし、従来のレンダリング手法では金属面の様な滑らかな表面を表現することができなかった。そこで、本研究はポリゴン法の表面関数を擬似的に分割することで、鏡面性表面のスムーズシェーディングを行う方法を提案する。

DOI： 10.11485/itetr.35.14.0_77

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：IEEE  

High-definition computer-generated holograms (CGH) created by the polygon-based method feature reconstruction of very fine 3D image accompanied with strong sensation of depth. However, rendering technique for specular surfaces has not been established. We propose a novel technique for smooth shading of specular surfaces in the polygon-based method. This technique divides the surface function of polygons into some segments and controls the spectral envelopes.

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：SPIE-INT SOC OPTICAL ENGINEERING  

Recent development of computer algorithms and micro fabrication technologies allows us to reconstruct the wave-field of light emitted from a completely virtual 3D scene given by the numerical model. In addition, recent evolution of image sensors and a technique for capturing real object waves makes it possible to digitize the whole process of classical holography. The wave-field of the virtual, real, and hybrid scene are optically reconstructed by the computer holograms fabricated by laser lithography system. The produced spatial 3D images have a wide viewing-zone in full-parallax and give viewers a strong sensation of depth, which never has been caused by conventional 3D systems.

DOI： 10.1117/12.884371

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：OPTICAL SOC AMER  

A novel method is proposed for simulating free-space propagation from an input source field to a destination sampling window laterally shifted from that in the source field. This off-axis type numerical propagation is realized using the shifted-Fresnel method (Shift-FR) and is very useful for calculating non-paraxial and large-scale fields. However, the Shift-FR is prone to a serious problem, in that it causes strong aliasing errors in short distance propagation. The proposed method, based on the angular spectrum method, resolves this problem. Numerical examples as well as the formulation are presented. (C) 2010 Optical Society of America

DOI： 10.1364/OE.18.018453

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記述言語：日本語   出版者・発行元：一般社団法人 映像情報メディア学会  

デジタルホログラフィにより実在の物体の光波をデジタル的に記録することができる.しかし,イメージセンサの解像度が低いため,記録した光波をCGHとして光学再生するにはそのままではピクセルピッチとピクセル数が不十分である.そこで本研究では,位相シフトレンズレス合成開口デジタルホログラフィを用いて高分解能な光波情報を取得し,それを超高解像度CGHとして光学再生することを試みた.

DOI： 10.11485/itetr.34.36.0_5

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記述言語：日本語   出版者・発行元：一般社団法人 映像情報メディア学会  

ポリゴン法を用いた超高解像度CGHは,シルエット法による光波遮蔽により強い立体感を与える自然な空間像を再生する特徴がある.しかし,物体が自己オクルージョンの生じる複雑な形状を有する場合,シルエット法によるその隠面消去処理は容易ではなく,また広がりのある単一の物体を計算することも容易ではない.本研究では,陸地の3Dシーンを生成するソフトであるTerragenが生成するメッシュデータを分割処理することにより,山岳風景を再生するCGHの作成を試みた.

DOI： 10.11485/itetr.34.36.0_9

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：INST IMAGE INFORMATION & TELEVISION ENGINEERS  

Spatial 3D images created by high-definition computational holography are actually demonstrated. The demonstrated 3D images are static images at this stage. However, these presage the great future of 3D displays beyond the Super Hi-Vision because of its strong sensation of depth, which never has been caused by conventional 3D systems.

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：SPIE-INT SOC OPTICAL ENGINEERING  

A large-scale CGH named "The Venus", created by using the polygon-based method, was demonstrated in the last year. However, the 3D scene of the Venus is restricted by the shifted Fresnel method used for numerical propagation using segmented frame buffers, because severe aliasing errors are produced if the propagation distance is shorter than a specific value in the method. In this paper, a novel method referred to as the shifted angular spectrum method is proposed for short distance propagation using the segmented frame buffers. The method can remove the restriction and give flexibility to design of 3D scenes. Both CGHs calculated by old and new methods are demonstrated.

DOI： 10.1117/12.844606

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：INST IMAGE INFORMATION & TELEVISION ENGINEERS  

Extremely high-definition displays beyond Super Hi-Vision give us a new horizon in the field of 3D imaging. This paper introduces spatial 3D imaging brought by computational holography and techniques for numerical propagation of wave-fields that make it possible to create the spatial 3D images.

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：OPTICAL SOC AMER  

A novel method is proposed for simulating free-space propagation. This method is an improvement of the angular spectrum method (AS). The AS does not include any approximation of the propagation distance, because the formula thereof is derived directly from the Rayleigh-Sommerfeld equation. However, the AS is not an all-round method, because it produces severe numerical errors due to a sampling problem of the transfer function even in Fresnel regions. The proposed method resolves this problem by limiting the bandwidth of the propagation field and also expands the region in which exact fields can be calculated by the AS. A discussion on the validity of limiting the bandwidth is also presented. (C) 2009 Optical Society of America

DOI： 10.1364/OE.17.019662

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：SPIE-INT SOC OPTICAL ENGINEERING  

A novel technique is presented for calculating large-scale CGHs by using polygon-based method. In the technique, wave fields are regionally segmented and propagated by using the shifted Fresnel method. As a result, large CGHs can be calculated even in the case that the whole frame buffer can not be stored in main memory. The produced full-parallax CGH has the size of four billion pixels and reconstructs the fine image of a smooth surface object accompanied with a strong depth sensation.

DOI： 10.1117/12.808633

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記述言語：日本語   出版者・発行元：一般社団法人 映像情報メディア学会  

計算機合成ホログラムにおける物体光波計算には点光源法が多く用いられてきたが,表面モデルで全方向視差ホログラムを計算した場合長い計算時間を要する点,またオクルージョンが生じるシーンを再生するための有効な隠面消去法が存在しない点が問題となっていた.本研究では,この問題を解決するため著者らが提案したポリゴン法物体光波形成技術とシルエット法光波遮蔽技術で計算を行い,レーザーリソグラフィ技術によって40億ピクセル規模の全方向視差計算機合成ホログラムの試作を行った.このホログラムの再生像は両眼視が可能であり,簡易的ではあるが相互オクルージョンのあるシーンを再生するため,従来無かったほどの強い立体感を有する美しい空間像となっている.

DOI： 10.11485/itetr.33.24.0_27

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記述言語：日本語   出版者・発行元：一般社団法人 映像情報メディア学会  

CGHを作製せずに再生像を確認するシミュレーションとして従来提案されている手法は,眼のレンズを通して波動光学的に結像した網膜像ではなく,また非回折光や共役像のシミュレーションも報告されていない.そこで本研究では,近年提案されているシフトフレネル回折計算法と回転変換を用いた純粋な波動光学的手法により,CGHを観察したときの網膜像をシミュレーションする手法を提案している.この手法には非回折光や共役像も正確に再現できる特徴がある.今回の発表では特に,再生照明光の波面がCGH計算時の参照光と異なる場合の再現性について報告する.

DOI： 10.11485/itetr.33.35.0_5

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記述言語：日本語   出版者・発行元：一般社団法人 映像情報メディア学会  

CGHにおいて自然な再生像を得るためには隠面消去や光波遮蔽が不可欠である.しかしCGHの数値合成によく用いられる点光源法のような光線光学的手法では,全方向視差で光波遮蔽を行うことが難しい.一方,波動光学的手法を用いれば全方向視差でも比較的容易に隠面消去が行える.しかし,従来の波動光学的手法では遮蔽の回数だけ全光波の伝搬計算が必要であり,分割計算が必要な大規模なCGHでは非常に長い計算時間が必要であった.そこで本研究では,シフトフレネル回折計算法を用いて部分光波伝搬計算を行い,Babinetの原理に基づいて,物体が存在する部分のみの部分光波をシルエット法により遮蔽する高速な隠面消去法を提案する.

DOI： 10.11485/itetr.33.35.0_1

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：OPTICAL SOC AMER  

Free-viewpoint images obtained from phase-shifting synthetic aperture digital holography are given for scenes that include multiple objects and a concave object. The synthetic aperture technique is used to enlarge the effective sensor size and to make it possible to widen the range of changing perspective in the numerical reconstruction. The lensless Fourier setup and its aliasing-free zone are used to avoid aliasing errors arising at the sensor edge and to overcome a common problem in digital holography, namely, a narrow field of view. A change of viewpoint is realized by a double numerical propagation and by clipping the wave field by a given pupil. The computational complexity for calculating an image in the given perspective from the base complex-valued image is estimated at a double fast Fourier transform. The experimental results illustrate the natural change of appearance in cases of both multiple objects and a concave object. (c) 2008 Optical Society of America.

DOI： 10.1364/AO.47.00D136

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

In this paper we report a method of removing hidden surfaces in full-parallax computer-generated holograms. First, we examine the handling of light shielding by tilted patches in terms of wave optics, and then propose a silhouette approximation. In addition, we derive a recurrence formula to synthesize object light waves with hidden surface removal by the proposed method. We show that appearance of optically reconstructed surface object of the full-parallax holograms generated by the proposed method varies in a natural manner as the observation point is changed. This study achieves hidden surface removal in full-parallax holograms, which was believed to be possible only if vertical parallax is ignored. © 2007 Wiley Periodicals, Inc.

DOI： 10.1002/scj.20345

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記述言語：日本語   出版者・発行元：レ-ザ-学会  

学外共同研究

DOI： 10.2184/lsj.35.299

CiNii Books

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担当区分：最終著者,　責任著者   記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3169/itej.60.561

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担当区分：最終著者,　責任著者  

学術研究助成基金

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担当区分：筆頭著者,　責任著者   記述言語：日本語   掲載種別：研究論文（学術雑誌）  

科研費基盤研究

DOI： 10.3169/itej.58.1665

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：OPTICAL SOC AMER  

A novel method for simulating field propagation is presented. The method, based on the angular spectrum of plane waves and coordinate rotation in the Fourier domain, removes geometric limitations posed by conventional propagation calculation and enables us to calculate complex amplitudes of diffracted waves on a plane not parallel to the aperture. This method can be implemented by using the fast Fourier transformation twice and a spectrum interpolation. It features computation time that is comparable with that of standard calculation methods for diffraction or propagation between parallel planes. To demonstrate the method, numerical results as well as a general formulation are reported for a single-axis rotation. (C) 2003 Optical Society of America.

DOI： 10.1364/JOSAA.20.001755

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：SPIE-INT SOC OPTICAL ENGINEERING  

Optical systems can be understood as a sequence of homogeneous and inhomogeneous regions (free spaces and optical elements). In wave-optical engineering these regions are often analyzed separately using different physical approximations. The propagation of a wave within a homogeneous medium is well understood and described by different propagation integrals (for example by the angular spectrum of plane waves propagation, the Rayleigh Sommerfeld propagation and paraxial approximations following from these integrals). To allow a fast numerical evaluation of these integrals, typically Fast Fourier Transforms are used. If the propagation integrals are evaluated using Fast Fourier Transforms it follows automatically that start and end plane of the propagation have to be perpendicular to the optical axis. This can be a disadvantage if the complex amplitude of a propagating wave has to be calculated on a plane non-parallel to the start plane of the propagation. Examples are the propagation of a wave to a screen which is tilted to the optical axis, the calculation of reflection of a wave on a tilted mirror and changing of the main propagation direction of a wave after a prism.
The authors will demonstrate a modified propagation integral based on the angular spectrum of plane wave propagation that overcomes this limitation and allows a fast numerical evaluation using Fast Fourier Transforms. The advantage of the propagation method will be demonstrated on various examples.

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：SPIE-INT SOC OPTICAL ENGINEERING  

Novel method for synthesizing light waves from objects expressed in surface model is presented for fast creation of digitally synthetic holograms. This method has a feature of coordinates rotation in Fourier domain, in which only twice FFTs and an interpolation of spectrum are necessary for calculation of light waves from each object's plane. Therefore, presented method is rather faster than conventional ray-tracing when large scale full-parallax holograms are synthesized in a surface model. Phases of a surface object are also discussed in relation to controlling the direction and diffusiveness of object waves. Furthermore, fabrication of a hologram based on the method and its reconstruction are presented for a demonstration.

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記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3169/itej.56.1989

Scopus

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記述言語：日本語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3169/itej.56.986

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担当区分：筆頭著者   記述言語：日本語   出版者・発行元：レーザー学会  

This paper presents a novel type of optically pumped molecular laser and its output properties which were measured for several operational parameters. This optically side-pumped laser emits a sub-millimeter wave and features a lateral incidence of the infrared pump light. The dimension of the fabricated laser is 640 X 190 X185 mm3 and is considerably compact compared to conventional, optically pumped molecular lasers. The optically side-pumped laser, which operates on a CH3OH 119 symbolm line pumped with CO2 9P(36), emitted a power of 39 μW at a pump power of 13 W. Gain profiles, absorption efficiency and the reflection loss of pump light in the new laser are theoretically discussed and compared with those of the conventional end-pumped type.

DOI： 10.2184/lsj.29.260

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その他リンク： http://hdl.handle.net/10112/5898

担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：OPTICAL SOC AMER  

A method for accelerating the synthesis of computer-generated three-dimensional (3-D) holograms, based on conventional ray tracing, is proposed. In ray tracing, computers expend almost all of their resources in calculating the 3-D distances between each one of the point sources composing an object and a sampling point on the hologram. We present recurrence formulas that precisely compute the distances and reduce the computation time for synthesizing holograms to one half to one quarter, depending on the processor type. We demonstrate that a full-parallax hologram with an area of 4800 x 4800 pixels, synthesized for a 3-D object containing 966 point sources of light, is computed within 17 min and is optically reconstructed. (C) 2000 Optical Society of America OCIS codes: 000.4430, 090.1760, 090.2870.

DOI： 10.1364/AO.39.006587

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担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：ELSEVIER SCIENCE BV  

We report directional anisotropy of the outputs of an optically pumped far-infrared ring laser, which operates on the 119 mu m line of CH3OH, with special emphasis on the effect of the Raman-type two-photon process on the unidirectional operation. By use of a Doppler broadened three-level system which allows the coexistence of two counterpropagating far infrared (fir) fields as well as a pump field in the cavity, an expression for the fir intensity determining equations is derived, A numerical calculation has been carried out to map the threshold contours on the parameter plane spanned by the cavity and pump detuning frequencies. The output directionality is shown to be a direct consequence of the gain anisotropy due to the two-photon process. Furthermore, it is also noted how the dynamic Stark effect modifies the threshold contours of the forward output.

DOI： 10.1016/0030-4018(96)00360-4

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担当区分：筆頭著者   記述言語：英語   出版者・発行元：ELSEVIER SCIENCE BV  

An experimental and theoretical investigation has been made on the unidirectional operation of an optically pumped far infrared ring laser. A ring laser operating on the 119 mu m line of CH3OH experiences reversal of output direction in either case of (a) the pump frequency being tuned across the line center of the infrared pump transition or (b) the fir cavity being tuned across the far infrared line center. A model based on two-mode laser theory predicts the output directionality of the optically pumped fir ring laser.

DOI： 10.1016/0030-4018(95)00189-F

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担当区分：筆頭著者,　責任著者   記述言語：日本語   出版者・発行元：レ-ザ-学会  

DOI： 10.2184/lsj.20.20

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担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：PLENUM PUBL CORP  

DOI： 10.1007/BF01009116

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

Electric field effect on absorption in some pump transitions of CH3OH fir laser lines is analysed in terms of zero-field level-crossing effect with reference to homogeneous linewidths observed in intermodulated absorption method with photoacoustic etection. © 1988 SPIE.

DOI： 10.1117/12.978486

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担当区分：筆頭著者,　責任著者   記述言語：日本語   出版者・発行元：レーザー学会  

Growth of the output power of an optically-pumped CH3OH FIR laser has been observed by an intracavity Stark-switching technique and discussed by a two-level model. The output power shows a relaxation oscillation similar to the one observed previously on many solid state lasers. The curves of growth calculated using a rate equation approximation fail to fit the observations, when the buildup time of the output power becomes comparable to or shorter than the relaxation time of polarization of the lasing medium. In that case, Maxwell-Bloch type equations, which give more precise description of the model than the rate equation, yield curves of growth in better agreement with the observations.

DOI： 10.2184/lsj.16.63

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その他リンク： http://hdl.handle.net/10112/5899

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：PLENUM PUBL CORP  

DOI： 10.1007/BF01010818

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記述言語：日本語   出版者・発行元：The Laser Society of Japan  

DOI： 10.2184/lsj.15.Supplement_23

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記述言語：日本語   出版者・発行元：電子情報通信学会  

CiNii Books

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記述言語：日本語   出版者・発行元：電子情報通信学会  

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記述言語：日本語   出版者・発行元：映像情報メディア学会  

CiNii Books

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記述言語：日本語   出版者・発行元：映像情報メディア学会  

従来，主として計算時間の問題のため，全方向視差高解像度CGHはポリゴン法で計算されることが多く，特にレーザーリソグラフィによる高解像度CGHは点光源法で作成されたことがなかった．しかし，点光源法はGPUの性能向上に伴って急速にその実用性が増している．そこで本研究では，点光源法とGPUを用いて40億ピクセル規模の高解像度CGHを作成し，その計算時間と光学再生像の確認およびポリゴン法との比較を行った．

DOI： 10.11485/itetr.40.29.0_13

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記述言語：日本語   出版者・発行元：関西大学先端科学技術推進機構  

CiNii Books

J-GLOBAL

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記述言語：日本語   出版者・発行元：関西大学先端科学技術推進機構  

CiNii Books

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記述言語：日本語   出版者・発行元：関西大学先端科学技術推進機構  

CiNii Books

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記述言語：日本語   出版者・発行元：電子情報通信学会  

CiNii Books

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記述言語：日本語   出版者・発行元：電子情報通信学会  

CiNii Books

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記述言語：日本語  

J-GLOBAL

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記述言語：日本語   出版者・発行元：関西大学先端科学技術推進機構  

CiNii Books

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記述言語：日本語   出版者・発行元：一般社団法人映像情報メディア学会  

コンピュータホログラフィで深い奥行き感を持つ三次元像を再生するためには,オクルージョン処理のために適切な隠面消去が不可欠であり,その手法としてスイッチバック法が提案されている.スイッチバック法では物体モデルを奥行き方向に分割することで計算時間が削減されるが,分割したサブモデルでは全光波伝搬が必要になるため分割数には最適値がある.本報告では,従来より高精度の最適分割数推定手法とその精度について述べる.

CiNii Books

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記述言語：日本語   出版者・発行元：関西大学先端科学技術推進機構  

CiNii Books

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記述言語：日本語   出版者・発行元：関西大学先端科学技術推進機構  

CiNii Books

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記述言語：日本語   出版者・発行元：一般社団法人映像情報メディア学会  

波面プリンタは,体積ホログラムとして計算機合成ホログラム(CGH)を作製する描画装置であり,空間光変調器(SLM)によって発生させた波面を記録する.提案する方式では,広い空間バンド積を得るために位相型SLMを使用しており,位相変調によるコーディングノイズの影響で波面が劣化する問題がある.本研究では,位相型SLMの位相変調と偏光角度変調の併用により位相と振幅の両方を変調した波面を描画することで,位相変調によるコーディングノイズを緩和する手法を報告する.

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記述言語：日本語   出版者・発行元：一般社団法人映像情報メディア学会  

高速計算手法やレンダリング手法などの発達により,計算機合成ホログラム(CGH)の表現力は向上しており,コンピュータホログラフィが新しいデジタルアートとして期待されている.しかしCGH作品の制作には光学の専門知識とプログラミング技術が必要であり,本来CGH作品を制作するべきデザイナーやアーティストには技術的ハードルが高かった.そこで,ホログラムの3Dシーンを会話的にデザインできるツールを開発している.このツールはデザイン結果をXML形式で保存・読込でき,研究者がそれを用いることもできる統合的なシステムとなっている.本報告はその概要,特にそのツールを用いたコンピュータホログラフィ作品の制作工程を述べている.

CiNii Books

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記述言語：日本語   出版者・発行元：一般社団法人映像情報メディア学会  

ポリゴン法やデジタイズドホログラフィにより合成あるいは取得した光波から制作される計算機合成ホログラムは新しいデジタルアートとして期待されている.しかし,この様な手法を用いてホログラムを作成するには,光学の専門知識とプログラミング技術が必要であり,本来ホログラム作品を制作するべきデザイナやアーティストには技術的ハードルが高かった.そこで,扱い易いユーザーインターフェースを有し,XMLによるシーンパラメータの記述や用途に応じた計算エンジンなど,幅広いソフトウェア基盤を提供する物体光波合成/編集ツールの開発を行っている.そのシステム設計や現時点での開発状況を報告する.

CiNii Books

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記述言語：日本語   出版者・発行元：応用物理学会分科会日本光学会  

CiNii Books

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（日本語版）YouTube: http://www.youtube.com/watch?v=8lYNDHKEMDc <br />
（英語版）YouTube: http://www.youtube.com/watch?v=DdOveIue3sc

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記述言語：日本語   出版者・発行元：一般社団法人電子情報通信学会  

CiNii Books

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記述言語：日本語   出版者・発行元：一般社団法人電子情報通信学会  

CiNii Books

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記述言語：日本語   出版者・発行元：一般社団法人電子情報通信学会  

CiNii Books

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記述言語：日本語   出版者・発行元：一般社団法人電子情報通信学会  

CiNii Books

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出版者・発行元：The International Society for Optical Engineering  

A high resolution fringe printer developed for driving the research in computer-generated holograms is presented. This fringe printer consists of a rotation drum and a laser diode and is capable of printing elliptical dots of 1.5 times 3.0 microns in diameter on photosensitive films. These dot sizes are approximately converted into resolutions of 17,000dpi × 8,500dpi. The horizontal and vertical angles of viewing-zone of holograms printed by the printer reach 24 and 12 degrees, respectively. The designed maximum scan speed is more than 200mm/s, and at current stage of development, a hologram of approximately 50 mm square can be printed in approximately 2 hours.right:Ⓒ2006 COPYRIGHT SPIE--The International Society for Optical Engineering.(Link:http://dx.doi.org/10.1117/12.649472)

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記述言語：日本語   出版者・発行元：一般社団法人電子情報通信学会  

CiNii Books

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出版者・発行元：The International Society for Optical Engineering  

A new algorithm for removing hidden surfaces from reconstruction of computer-generated holograms is presented. The object used in the algorithm is defined by surface model and each polygon composing the object provides a mask for blocking the incident field into the backside of the polygon. The computational cost of the proposed algorithm is 2 FFT/polygon by handling field transmission in Fourier space and integrating the surface diffraction method for generating fields. Reconstruction of a hologram synthesized by using the presented algorithm is demonstrated.right:Ⓒ2005 COPYRIGHT SPIE--The International Society for Optical Engineering.(Link:http://dx.doi.org/10.1117/12.592520)

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記述言語：日本語   出版者・発行元：関西大学  

CiNii Books

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記述言語：日本語   出版者・発行元：映像情報メディア学会  

CiNii Books

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記述言語：日本語   出版者・発行元：FIT(電子情報通信学会・情報処理学会)運営委員会  

CiNii Books

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記述言語：日本語   出版者・発行元：一般社団法人電子情報通信学会  

CiNii Books

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記述言語：日本語   出版者・発行元：一般社団法人電子情報通信学会  

CiNii Books

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記述言語：日本語   出版者・発行元：一般社団法人電子情報通信学会  

CiNii Books

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出版者・発行元：The International Society for Optical Engineering  

A novel algorithm is presented for hidden-surface removal in digitally synthetic holograms. The algorithm is able to work with full-parallax holograms and remove obstructed fields in the object wave emitted from threedimensional (3-D) surface objects. This algorithm is initially discussed as a rigorous procedure to obtain fields behind a tilted planar surface by using the rotational transformation of wave fields,and finally results in the silhouette approximation for reduction of computation time. Reconstructions of holograms created by using the algorithm are demonstrated.right:Ⓒ2004 COPYRIGHT SPIE--The International Society for Optical Engineering.(Link:http://dx.doi.org/10.1117/12.526747)

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記述言語：英語   出版者・発行元：Optical Society of America  

A novel method for simulating field propagation is presented. The method, based on the angular spectrum of plane waves and coordinate rotation in the Fourier domain, removes geometric limitations posed by conventional propagation calculation and enables us to calculate complex amplitudes of diffracted waves on a plane not parallel to the aperture. This method can be implemented by using the fast Fourier transformation twice and a spectrum interpolation. It features computation time that is comparable with that of standard calculation methods for diffraction or propagation between parallel planes. To demonstrate the method, numerical results as well as a general formulation are reported for a single-axis rotation.

CiNii Books

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記述言語：日本語   出版者・発行元：一般社団法人電子情報通信学会  

CiNii Books

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記述言語：日本語   出版者・発行元：一般社団法人電子情報通信学会  

CiNii Books

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記述言語：日本語   出版者・発行元：関西大学  

CiNii Books

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記述言語：日本語   出版者・発行元：関西大学  

CiNii Books

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記述言語：日本語   出版者・発行元：一般社団法人電子情報通信学会  

CiNii Books

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記述言語：日本語   出版者・発行元：一般社団法人電子情報通信学会  

CiNii Books

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記述言語：日本語   出版者・発行元：一般社団法人映像情報メディア学会  

CiNii Books

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記述言語：日本語   出版者・発行元：一般社団法人映像情報メディア学会  

An investigation has been made on computer-generated holograms for 3-D objects composed of plane surfaces. Brightness of the plane surface uniformly filled with point sources is analyzed by a model based on photometry. Algorithm which effectively utilizes geometric relations between the plane surface and a hologram is suggested for a fast calculation of object waves.

CiNii Books

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記述言語：日本語  

CiNii Books

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記述言語：日本語   出版者・発行元：関西大学工業技術研究所  

CiNii Books

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記述言語：日本語   出版者・発行元：一般社団法人日本物理学会  

CiNii Books

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記述言語：日本語   出版者・発行元：一般社団法人日本物理学会  

CiNii Books

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記述言語：日本語   出版者・発行元：一般社団法人日本物理学会  

CiNii Books

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記述言語：日本語   出版者・発行元：一般社団法人日本物理学会  

CiNii Books

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記述言語：日本語   出版者・発行元：一般社団法人日本物理学会  

CiNii Books

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記述言語：日本語   出版者・発行元：一般社団法人日本物理学会  

CiNii Books

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記述言語：日本語   出版者・発行元：一般社団法人日本物理学会  

CiNii Books

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開催地：San Francisco  

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ポスターセッション

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開催地：Sapporo Convention Center  

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開催地：大阪府立大学  

Invited

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会議種別：口頭発表（招待・特別）  

開催地：Jiaoxi (Taiwan)  

Invited

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開催地：筑波大学東京キャンパス  

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開催地：機械振興会館(東京)  

映情学技報, vol. 40, no. 36, 3DIT2016-29, pp. 13-16, 2016年10月

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開催地：Heidelberg (Germany)  

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開催地：Heidelberg (Germany)  

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開催地：埼玉大(東京)  

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ポスターセッション

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ポスターセッション

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開催地：Hsinchu (Taiwan)  

http://www.facebook.com/HODIC2015/

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開催地：Ginowan (Okinawa)  

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開催地：Ginowan (Okinawa)  

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開催地：Ginowan (Okinawa)  

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Invited

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開催地：筑波大学東京キャンパス  

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開催地：筑波大学東京キャンパス  

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開催地：Jena (Germany)  

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開催地：San Diego (USA)  

Invited

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開催地：St Petersburg (Russia)  

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開催地：Kyoto  

Invited

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開催地：Shanghai (China)  

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開催地：San Francisco (USA)  

http://dx.doi.org/10.1117/12.2075998

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開催地：San Francisco  

http://dx.doi.org/10.1117/12.2076876

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開催地：Beijing, china  

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開催地：Daegu (Korea)  

Invited

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開催地：Seattle  

http://dx.doi.org/10.1364/DH.2014.DTu2B.7

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開催地：Neuchatel (Switzerland)  

Invited, http://dx.doi.org/10.1109/WIO.2014.6933293

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開催地：San Francisco  

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開催地：San Francisco  

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開催地：Daejeon(Korea)  

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開催地：Kitami  

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開催地：Kitami  

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開催地：Capri(Italy)  

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開催地：Osaka  

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開催地：Hawaii  

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開催地：San Francisco  

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開催地：Tainan (Taiwan)  

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開催地：Tainan (Taiwan)  

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開催地：MIT Media Lab, Cambridge  

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開催地：San Francisco  

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開催地：San Francisco  

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開催地：Utsunomiya  

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開催地：Utsunomiya  

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開催地：Antalya, Turkey  

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開催地：Antalya, Turkey  

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開催地：Tokyo  

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開催地：Tokyo  

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開催地：Orland  

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開催地：San Francisco  

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開催地：Fukuoka  

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開催地：Fukuoka  

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開催地：Yamagata  

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開催地：Los Angeles  

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開催地：Miami  

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開催地：吹田  

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開催地：San Francisco  

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開催地：新潟  

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開催地：新潟  

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開催地：新潟  

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開催地：新潟  

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開催地：北海道大学  

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開催地：San Jose  

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開催地：Vancouver  

学外共同研究費

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開催地：Vancouver  

学外共同研究費

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開催地：Vienna， Austria  

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開催地：関西大学  

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出願番号：特願2003-309517  出願日：2003年9月

特許番号/登録番号：特許第4535422号  登録日：2010年6月  発行日：2010年6月

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受賞国：日本国

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受賞国：日本国

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受賞国：日本国

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