Nonlinear response studies and corrections for a liquid crystal spatial light modulator |
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Authors: | Ravinder Kumar Banyal and B. Raghavendra Prasad |
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Affiliation: | (1) Center for Information Storage Device, 332D, YERC, Yonsei University, 134, Shinchon-dong, Seodaemoon-ku, Seoul, 120-749, South Korea; |
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Abstract: | The nonlinear response of light transmission characteristics of a liquid crystal (LC) spatial light modulator (SLM) is studied. The results show that the device exhibits a wide range of variations with different control parameters and input settings. Experiments were performed to obtain intensity modulation that is best described by either power-law or sigmoidal functions. Based on the inverse transformation, an appropriate pre-processing scheme for electrically addressed input gray-scale images, particularly important in several optical processing and imaging applications, is suggested. Further, the necessity to compensate the SLM image nonlinearities in a volume holographic data storage and retrieval system is demonstrated. |
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