Contrast ratio of vertically aligned nematic cell

David Armitage

doi:10.1117/12.383377

25 April 2000 Contrast ratio of vertically aligned nematic cell

David Armitage

Proceedings Volume 3954, Projection Displays 2000: Sixth in a Series; (2000) https://doi.org/10.1117/12.383377
Event: Electronic Imaging, 2000, San Jose, CA, United States

Abstract

The vertical aligned nematic cell is favored in reflective projector systems because of its inherent high contrast ratio, which is essentially independent of cell gap variation and wavelength. Off-axis projectors are of commercial interest due to lower manufacturing cost. A computational study of projector contrast ratio as a function of projection f/number and offset angle is presented. The off-axis system maintains a contrast ratio greater than 100 up to offset angles of 15-degrees. Modest compensation with a negative uniaxial retarder allows the off-axis projector to reach contrast ratios comparable with on-axis systems.

Citation Download Citation

David Armitage "Contrast ratio of vertically aligned nematic cell", Proc. SPIE 3954, Projection Displays 2000: Sixth in a Series, (25 April 2000); https://doi.org/10.1117/12.383377

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