Results 151 to 160 of about 316 (190)
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Computer-generated Binary Holograms
IBM Journal of Research and Development, 1969Holograms synthesized by computer are used for constructing optical wavefronts from numerically specified objects. Elimination of the need for a physical object has made new applications possible, for example, three-dimensional computer output displays, synthetic prototypes for interferometric testing, and filters for various optical data processing ...
B. R. Brown, A. W. Lohmann
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Computer generated cylindrical hologram
SPIE Proceedings, 2005In this paper, we propose the new fast calculation method of computer generated cylindrical hologram and report experimental results of three-dimensional image reconstruction. Conventionally, it takes a huge amout of time to compute cylindrical hologram data, because it is based on a point-light object method.
Yuji Sakamoto, Masaaki Tobise
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Double-multiplexed computer-generated holograms
OSA Annual Meeting, 1993The most important element in an optical data processor is the complex spatial filter. Lohmann and Paris1 invented the detour phase method for binary encoding of a complex filter function. The reconstructed object is obtained along the first diffraction order.
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New computer-generated hologram
SPIE Proceedings, 1997A method for calculating in real time, the transmission function of a computer generated hologram (CGH) for beam shaping, is described. This method is based on the well known phase contrast method (PCM) in which phase distributions of an object are transformed to intensity distributions.
Yoel S. Arieli +2 more
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Stereoscopic Computer-Generated Hologram
Digital Holography and Three-Dimensional Imaging, 2016Stereoscopic computer-generated hologram (SCGH) is able to provide accurate depth cues for three-dimensional display. We proposed to use look-up table instead of directly point-by-point computation to reduce the computation time of SCGH. The problem of artifacts arose in using lookup table is also discussed.
Chen-Yu Yu, Sung-Lin Lu, Jung-Ping Liu
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Applications of Computer Generated Hologram
Advances in Imaging, 2009In this paper we describe the use of computer-generated holograms in creating light diffusing film for use in back lighted liquid crystal displays (LCD).
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Polarizing computer-generated holograms
Optical Engineering, 1993Polarizing computer-generated holograms (PCGH) may be useful combining different optical functions such as polarizing, imaging, beam shaping, and beamsplitting in one element. We propose the fabrication of PCGHs based on microstructuring of polarizing or birefringent materials.
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Optical image encryption and authentication using phase-only computer-generated hologram
Optics and Lasers in Engineering, 2021Bijun Xu, Xiaogang Wang, Junlang Chen
exaly
Image encryption based on computer generated hologram and Rossler chaotic system
Optical and Quantum Electronics, 2021Raied Jamal +2 more
exaly