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Proceedings Paper

Laser imaging method using computational holography
Author(s): Tao Wang; Yingjie Yu; Huadong Zheng
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Paper Abstract

To form a laser image, there usually are two kinds of image forming methods. One is to direct slender laser beams to special points by light directing element (LDE). The other one is light blocking method where amplitude spatial light modulator (SLM) used to form laser image. The former method has high light efficiency for none light is blocked, however precision mechanical instrument used as LDE is needed. In this paper, we describe a new kind of laser imaging method based on computational holography. Coherent light is used as source and phase SLM as LDE. The function of phase SLM is to change the phase of light illuminated on it. The light on the pixel will travel in new direction according to the phase change. Iterative Fourier Transform Algorithm (IFTA), also known as G-S algorithm, is used to find phase change value of each pixel. The process of laser image forming is simulated with VirtualLab™ and optical system is built to form the laser image. 2D and 3D image can be formed by the proposed method and they enjoy the advantages of laser display, such as full color gamut and sharp intensity.

Paper Details

Date Published: 17 November 2010
PDF: 8 pages
Proc. SPIE 7848, Holography, Diffractive Optics, and Applications IV, 78481P (17 November 2010); doi: 10.1117/12.870198
Show Author Affiliations
Tao Wang, Shanghai Univ. (China)
Yingjie Yu, Shanghai Univ. (China)
Huadong Zheng, Shanghai Univ. (China)

Published in SPIE Proceedings Vol. 7848:
Holography, Diffractive Optics, and Applications IV
Yunlong Sheng; Chongxiu Yu; Linsen Chen, Editor(s)

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