All issues
Volume 35, Issue 1
Displaying 1-9 of 9 articles from this issue
- |<
- <
- 1
- >
- >|
-
Osamu MATOBA2007 Volume 35 Issue 1 Pages 5
Published: January 15, 2007
Released on J-STAGE: March 26, 2014
JOURNAL FREE ACCESSDownload PDF (180K) -
Yasuhiro TAKAKI2007 Volume 35 Issue 1 Pages 6-10
Published: January 15, 2007
Released on J-STAGE: March 26, 2014
JOURNAL FREE ACCESSWe have developed high-density directional (HDD) displays which provides a natural three-dimensional image. The accommodation-vergence conflict does not occur and very smooth motion parallax is obtained. A large number of directional images are displayed simultaneously in the different horizontal directions with a very small angle pitch. There are two different display systems for the HDD display: one is the projection type system and the other is the flat-panel type system. We have constructed 64-, 72-, and 128-directional displays. Three applications of the HDD display are shown: the medical application, the high-appearance image generation, and the mobile application.View full abstractDownload PDF (9556K) -
Fumio OKANO, Jun ARAI2007 Volume 35 Issue 1 Pages 11-15
Published: January 15, 2007
Released on J-STAGE: March 26, 2014
JOURNAL FREE ACCESSSince three-dimensional (3-D) imaging based on the integral method forms optical images in a space, it can reproduce the same condition as viewers watching real objects. Viewers do not need to wear special viewing glasses, and also the method does not produce contradiction between convergence and accommodation for the human eye. Further, viewers can observe images corresponding to their position, horizontally and vertically. One specific characteristic of the method is that a natural light source, not coherent light, is used during capturing and displaying. Therefore, the method is considered to be one of the ideal 3-D imaging methods. The authors have developed an experimental real-time system that uses an extremely high resolution video system, and have verified the possibility of the 3-D television system, as described in this paper.View full abstractDownload PDF (1544K) -
Daisuke MIYAZAKI2007 Volume 35 Issue 1 Pages 16-20
Published: January 15, 2007
Released on J-STAGE: March 26, 2014
JOURNAL FREE ACCESSStudies on volumetric three-dimensional (3-D) displays are reviewed briefly. A volumetric display method based on 3-D scanning of an inclined image, developed by the author, is introduced. An optical image of a two-dimensional (2-D) display placed obliquely in an optical imaging system is moved laterally by a mirror scanner. Inclined cross-sectional images of a 3-D object are displayed on the 2-D display in accordance with the position of the image plane to form a volumetric image. The three-dimensional images formed by this display system satisfy all the requirements for stereoscopic vision. Experimental results of 3-D imaging achieved by a volumetric display system using a digital micromirror device are presented. Research for improving the practical performance of the volumetric display, such as realizing real-time volumetric imaging from 3-D measurement data and forming volumetric directional images and 3-D fluorescent images, is presented.View full abstractDownload PDF (12173K) -
Masahiro YAMAGUCHI2007 Volume 35 Issue 1 Pages 21-26
Published: January 15, 2007
Released on J-STAGE: March 26, 2014
JOURNAL FREE ACCESSIn this article, a 3D display technology based on light-ray reconstruction using holography is introduced, mainly focusing on the holographic 3D printer (holoprinter), which automatically prints the hardcopy of a digital 3D image by means of a holographic stereogram. The principle and system of recording and reconstructing full-color, full-parallax (both horizontal and vertical parallaxes) 3D images are described. It is also presented that the use of 3D displays based on light-ray reconstruction, such as a holographic stereogram, is significant for the realistic reproduction of gloss, shade, and texture of an object surface. Finally, by comparing a holographic stereogram and a hologram, discussions are given on the limitation of 3D displays by lightray reconstruction, and the features of wavefront reconstruction are addressed as well.View full abstractDownload PDF (9179K) -
Kenji NAKAZAWA2007 Volume 35 Issue 1 Pages 27-32
Published: January 15, 2007
Released on J-STAGE: March 26, 2014
JOURNAL FREE ACCESSThe depth fused 3D (DFD) display system is introduced as a promising stereoscopic display system providing less fatiguing means of viewing information. The stereovision is achieved simply by viewing two planes allocated at distances such that each plane has the same image, but different luminance. The mechanism of the DFD, other related interesting research findings, and some equipment based on the DFD mechanism are described. The results of a fatigue evaluation are also introduced.View full abstractDownload PDF (15856K) -
Motoaki NAKATSUTSUMI, Ryosuke KODAMA, Dimitri BATANI, Yifim AGLITSKIY, ...2007 Volume 35 Issue 1 Pages 33-37
Published: January 15, 2007
Released on J-STAGE: March 26, 2014
JOURNAL FREE ACCESSThe interaction of a sub-picosecond laser pulse with a solid target has been studied experimentally using focused laser intensities up to 1018 W cm-2. The measurement of emission at visible wavelengths from the rear side of the target and of Ka X-ray emission from the inside of the target indicates that an anomalous heating process occurs on the rear surface. This heating is most likely induced by the presence of a return current and/or the confinement of fast electrons on the rear surface, which are caused by the electric field of the sheath layer and the self-induced magnetic field.View full abstractDownload PDF (4912K) -
Atsushi UCHIDA, Shigeru YOSHIMORI, Ryan McALLISTER, Rajarshi ROY2007 Volume 35 Issue 1 Pages 38-42
Published: January 15, 2007
Released on J-STAGE: March 26, 2014
JOURNAL FREE ACCESSWe experimentally and numerically investigate consistency of response output in a Nd: YAG microchip laser driven repeatedly by chaos and colored noise with different bandwidths. An increase of consistency is observed as the amplitude, of the drive signal is increased for both chaos and colored noise drive signals. After reaching an optimal value the consistency begins to decrease due to the deterministic dynamics of the nonlinear response as shown by the change in sign of the conditional Lyapunov exponent.View full abstractDownload PDF (996K) -
Yuki TANIGUCHI, Yoshihiro EMORI, Atsushi OGURI, Ryuichi SUGIZAKI, Misa ...2007 Volume 35 Issue 1 Pages 43-46
Published: January 15, 2007
Released on J-STAGE: March 26, 2014
JOURNAL FREE ACCESSWe have developed a high Raman gain fiber that is applicable to Raman amplification over a wide wavelength region. Since this fiber has sufficiently low OH-loss, favorable amplification characteristics for S-band are expected. Using 2 km of this fiber, an S-band discrete Raman amplifier of single stage configuration is fabricated with three laser diodes, and gain characteristics are investigated for 30 S-band WDM signals (1490-1512nm) with 100-GHz spacing. Amplifier input/output of-9.5dBm/+4.5dBm and-20dBm/-3.5dBm×30ch with 1-dB flatness without any gain-flattening filters are achieved by total 680mW pump power.View full abstractDownload PDF (726K)
- |<
- <
- 1
- >
- >|