Measurement of phase modulation characteristics of liquid crystal spatial light modulator

Hongxin Zhang; Jian Zhang; Liying Wu; Yan Zhang

doi:10.1117/12.676511

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23 February 2006 Measurement of phase modulation characteristics of liquid crystal spatial light modulator

Hongxin Zhang, Jian Zhang, Liying Wu, Yan Zhang

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Proceedings Volume 6150, 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment; 61503W (2006) https://doi.org/10.1117/12.676511
Event: 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies, 2005, Xian, China

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.

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Hongxin Zhang, Jian Zhang, Liying Wu, and Yan Zhang "Measurement of phase modulation characteristics of liquid crystal spatial light modulator", Proc. SPIE 6150, 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 61503W (23 February 2006); https://doi.org/10.1117/12.676511

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