Nematic Liquid Crystal Phase-Gratings for Reflective Spatial Light Modulators
The twisted nematic liquid crystal phase grating, using patterned alignment with opposite twist angles for reflective spatial light modulators, is analyzed with respect to operating mode, diffraction efficiency and operating voltage including the effect of disclination lines between opposite twist d...
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Published in | Japanese Journal of Applied Physics Vol. 37; no. 5B; p. L587 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
01.05.1998
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Online Access | Get full text |
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Summary: | The twisted nematic liquid crystal phase grating, using patterned alignment with opposite
twist angles for reflective spatial light modulators, is analyzed with respect to operating mode,
diffraction efficiency and operating voltage including the effect of disclination lines between
opposite twist domains. In general, the high-field difflactive modes have lower operating
voltages, slower response time and relatively higher contrast ratio than zero-field diffractive
modes. We describe a high-field diffractive mode with a twist angle of approximately ±54° for opposite twist domains which achieves an optical efficiency of nearly 100% and an estimated contrast ratio greater than 300:1 for monochromatic light. |
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ISSN: | 0021-4922 1347-4065 |
DOI: | 10.1143/JJAP.37.L587 |