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Displaying 1-12 of 12 articles from this issue
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Article type: Cover
Pages Cover1-
Published: June 19, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (14K) -
Article type: Index
Pages Toc1-
Published: June 19, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (40K) -
Tatsuki Tahara, Akifumi Maeda, Yasuhiro Awatsuji, Takashi Kakue, Peng ...Article type: Article
Session ID: AIT2012-109/3DIT2012
Published: June 19, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWe present a single-shot dual-illumination phase-unwrapping technique using a single wavelength. Although dual-illumination phase unwrapping is a technique capable of high-accuracy three-dimensional (3D) shape measurement for even though a stepped-object, single-shot imaging was impossible because of the requirement of sequential recording of multiple holograms. In the presented technique, an object is illuminated by two laser beams simultaneously. The beams are emitted from the same laser, whose illumination angles and polarizations are different. Then two types of the object waves generated by the two beams are separately and simultaneously recorded by a polarization-imaging camera. We simulated and experimented the presented technique, and a 3D shape of an object was reconstructed without wrapping.View full abstractDownload PDF (913K) -
Kenji MACHIDA, Ken-ichi AOSHIMA, Daisuke KATO, Hidekazu KINJO, Kiyoshi ...Article type: Article
Session ID: AIT2012-110/3DIT2012
Published: June 19, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSFor the realization of an electronic holography with a wide viewing zone angle, we have advanced development of an ultra-fine magneto-optic spatial light modulator driven by spin transfer switching. This device, we call Spin-SLM, is a novel light modulator with the advantages of both submicron size of pixels and high-speed light modulation. In this report, we designed and fabricated a one-dimensional Spin-SLM composed of an array of 1×10 pixels with a fine pitch of 1 μm, and succeeded in spin transfer switching of the array. In order to indicate a potentiality of three-dimensional (3D) display in the Spin-SLM, a two-dimensional static hologram with a Him pixel-pitch was fabricated and it was recognized that holographic 3D images are reproduced with a wide viewing zone angle.View full abstractDownload PDF (814K) -
Kenji YAMAMOTO, Yasuyuki ICHIHASHI, Takanori SENOH, Ryutaro OIArticle type: Article
Session ID: AIT2012-111/3DIT2012
Published: June 19, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSOne of the current issues in electronic holography is that the size of reconstructed 3D objects is small. Although methods for increasing the size using multiple spatial light modulators (SLMs) have been considered, they typically had the problem that some parts of 3D objects were missing as a result of the gap between adjacent SLMs or 3D objects lost the vertical parallax. This paper proposes a method of resolving this problem by locating an optical system containing a lens array and other components in front of multiple SLMs. We performed experiments for this method to reconstruct 3D objects in both the horizontal and vertical parallax without losing any part of 3D objects.View full abstractDownload PDF (668K) -
Kyohei IKEDA, Yasuhiro TAKAKAIArticle type: Article
Session ID: AIT2012-112/3DIT2012
Published: June 19, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWe previously proposed a new calculation method for computer-generated holographic stereogram based on multi-view displays. The proposed calculation method does not require diffraction calculations. Holographic stereograms can be calculated by adding phase distributions of spherical waves to parallax images. In this study, we discuss the relationship between the number of viewing points and the resolution of parallax images based on the sampling theorem. We experimentally verified the derived relationship. An SLM with a resolution of 1,920×1,200 was used. We generated 10×5 viewpoints with an interval of 4.7 mm at the distance of 600 mm from the SLM. The resolution of parallax images was 192×120.View full abstractDownload PDF (689K) -
Satoshi KAJIRO, Takeshi YAMAGUCHI, Hiroshi YOSHIKAWAArticle type: Article
Session ID: AIT2012-113/3DIT2012
Published: June 19, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSThe Hologram is known that can reconstruct three-dimensional images completely. Computer-Generated Image Hologram (CGIH) is the Hologram that is calculated interference phenomenon by computer, and reconstructed image placed near the hologram plane. In our previous study, because of improvement of the output device, making high resolution and refinement CGIH become possible. However, the distortion of the reconstructed image caused by the approximate calculation for high-speed computing has become a serious problem. In this study, we abolish approximate calculation by fast computation using the GPU, and get the appropriate reconstruct image.View full abstractDownload PDF (736K) -
Masaki Nakamura, Takeshi Yamaguchi, Hiroshi YoshikawaArticle type: Article
Session ID: AIT2012-114/3DIT2012
Published: June 19, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSThe computer-generated holograms (CGH) can reproduce virtual objects as complete 3D image in real space. In our previous research, we created CGH by point sources that based on rendered virtual objects as 3DCG image. However, the point sources were not able to express delicate lights because the method based on basic shading algorithm. Therefore, we were not able to fruition a realistic reproduced image. In this report, we introduction ray tracing and radiosity in a generating process of point sources. From this, we realize to generate point sources for photo realistic CGH that includes mirror surface reflection, a soft shadow and recursive diffuse reflection.View full abstractDownload PDF (1351K) -
Shumpei Murata, Kyoji MatsushimaArticle type: Article
Session ID: AIT2012-115/3DIT2012
Published: June 19, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSComputer-generated holograms that reconstruct object fields synthesized by polygon-based method or captured by digitized holography are expected as a new digital art. However, artists or designers, who are potential creators of hologram works, are required to have deep knowledge in optics and programming skills in order to calculate the object fields of 3D scenes by using the methods. To ease this situation, we are developing software tools for scene design and numerical synthesis of object fields. The tools are easy to use for any non-expert and capable of describing the parameters of 3D scenes and object fields as a generic XML format. This system is expected to provide wide software basis in computer holography, such as computation engines for various purposes. We report the system architecture and the current state of the development.View full abstractDownload PDF (938K) -
Article type: Appendix
Pages App1-
Published: June 19, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (81K) -
Article type: Appendix
Pages App2-
Published: June 19, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (81K) -
Article type: Appendix
Pages App3-
Published: June 19, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (81K)
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