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Proceedings Paper

Measurement of phase modulation characteristics of liquid crystal spatial light modulator
Author(s): Hongxin Zhang; Jian Zhang; Liying Wu; Yan Zhang
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Paper Abstract

In order to obtain the phase modulation characteristics of liquid crystal spatial light modulator (LC SLM) a polarization interference method is introduced to measure the phase shift. In this method the polarized components of the light reflected from the LC SLM will interfere with each other after crossing two polarizers. The phase shift can be determined by analyzing the interference intensity. Since the two interference components of the light travel through the same path, the measurement setup is insensitive to vibrations and air currents, and then the accuracy of the measured data can be improved. The experiment results show that the phase modulations corresponding to different pixels of the LC SLM are relatively uniform across the aperture. The phase shifts will change linearly over 0 to 2π with gray levels when the custom look-up table (LUT) is used.

Paper Details

Date Published: 23 February 2006
PDF: 5 pages
Proc. SPIE 6150, 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 61503W (23 February 2006); doi: 10.1117/12.676511
Show Author Affiliations
Hongxin Zhang, Harbin Institute of Technology (China)
Harbin Univ. of Science and Technology (China)
Jian Zhang, Harbin Institute of Technology (China)
Liying Wu, Harbin Institute of Technology (China)
Yan Zhang, Harbin Institute of Technology (China)


Published in SPIE Proceedings Vol. 6150:
2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment
Xun Hou; Jiahu Yuan; James C. Wyant; Hexin Wang; Sen Han, Editor(s)

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