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Proceedings Paper

Initial phase assignment method for synthesizing computer generated hologram
Author(s): Enwen Dai; Changhe Zhou; Peng Xi; Shuai Zhao; Liren Liu
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Paper Abstract

Random phase is usually assigned to the amplitude of the desired image to synthesis the phase-only computer-generated hologram(CGH). As a matter of fact, the CGH can be obtained directly if proper phase is assigned. But it is rather difficult since there are infinite ways of phase assignment. Based on the symmetry, a new deterministic binary phase coding technique is introduced in this paper. According to this method, the amplitude of the desired image is coded by a binary array derived form the desired image itself. The coarse CGH can be obtained by applying inverse discrete Fourier transform of the previous result. In order to get higher diffraction efficiency the usual iterative method is used to optimize the CGH. Using this method we have obtained several CGHs with high diffraction efficiency. The pattern of the binary CGH is transferred into the glass plate by inductive coupled plasma (ICP) technology. Experimental results are also given in this paper.

Paper Details

Date Published: 21 December 2001
PDF: 6 pages
Proc. SPIE 4436, Wave-Optical Systems Engineering, (21 December 2001); doi: 10.1117/12.451305
Show Author Affiliations
Enwen Dai, Shanghai Institute of Optics and Fine Mechanics (China)
Changhe Zhou, Shanghai Institute of Optics and Fine Mechanics (China)
Peng Xi, Shanghai Institute of Optics and Fine Mechanics (China)
Shuai Zhao, Shanghai Institute of Optics and Fine Mechanics (China)
Liren Liu, Shanghai Institute of Optics and Fine Mechanics (China)


Published in SPIE Proceedings Vol. 4436:
Wave-Optical Systems Engineering
Frank Wyrowski, Editor(s)

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