摘要(英) |
Conventional multiplex holograms are composed of a series of long-thin individual holograms, resulting in so-called picket-fence effect and aberration on the 3-D image. The image-plane technique in hologram formation alleviates this aberration and picket-fence effect on the reconstructed image. In order to make the image-plane cylinder-type multiplex holograms possible, we adopt the “four-step experimental setup”. In the first step for master hologram fabrication, a diffuser is added into the optical system to increase the vertical viewing window. Then, all the 2D images retrieved from the master hologram are sequentially recorded onto the second master hologram using multiple-exposure procedure. Next, we adopt a collimated wave as the reconstruction reference beam to control the direction of the image wavefront from the second master hologram. In the fourth step, all the 2Dimages are recorded on the transfer hologram using a cylindrical reference wave. After bending the transfer hologram into a cylinder, the source line of cylindrical reference wave for hologram recording is compressed into a point on the axis of our cylindrical hologram. A white-light bulb can then be used as the illuminating light source for image reconstruction.
In this thesis, diffraction theory and computer simulation are used to calculate the direction of diffraction beam and to obtain the parameters needed for our experimental setup. The characteristics of the reconstructed 3D images and the methods to improve the quality of images are also discussed.
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參考文獻 |
[1] D. Gabor, “A new microscopic principle,” Nature ,161 777-778 (1948)
[2] D. Gabor, “Microscope by reconstructed wavefronts,” Proc. Roy. Soc. A197, 454-487 (1949).
[3] E. N. Leith and J. Upatnieks, “Wavefront reconstruction with diffused illumination and three dimensional objects,” JOSA ,154, 1295-1301 (1964).
[4] S.A Benton, “Hologram reconstruction with extended light source,” JOSA 59, 1545 (1969).
[5] D.J Debitetto, “Hologram panoramic stereograms synthesized from white-light recordings,” Appl. Opt. 8, 1740-1741 (1966).
[6] L. Cross,”The multiple technique for cylindrical holographic stereograms,” Proc. SPIE (1977).
[7] L. Huff and R. L. Fusek,“Cylindrical holographic stereograms,” International Symposium on Display Holography 1, 91-147 (1981).
[8] Y.S. Cheng, W.H. Su and R.C. Chang,“Disk-type multiplex holography,” Appl. Opt. 38 3093-3100 (1999).
[9] 陳志宏,”成像面圓盤型複合全像術,”中央大學光電科學研究所碩士論文(2000).
[10] 蘇永添,”可環繞觀賞之成像面圓盤型複合全像術,” 中央大學光電科學研究所碩士論文 (2002).
[11] 謝易辰,”反射式圓盤型複合全像術"中央大學光電科學研究所碩士論文(2004).
[12] 簡天隆,”擴展垂直視角之反射式圓盤型全像術” 中央大學光電科學研究所碩士論文 (2005).
[13] 陳宇宏,”全彩反射式圓盤複合全像術之視窗設計與數值模擬"中央大學光電研究所碩士論文 (2007).
[14] 邱冠凱,”全彩展示之反射式圓盤型複合全像術"中央大學光電科學研究所碩士論文(2007).
[15] S.A Benton, “’Alcove’ Holograms for Computer-Aided Design” Proc. SPIE, 761, 53 (1987).
[16] E. N. Leith, A. Kozma, J. Upatnieks, J. Marks, N. Massey“Holographic data storage in three-dimensional media,”Appl. Opt, 5, 1303-1311 (1966).
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