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Four-Domain Twisted Nematic Liquid Crystal Display Fabricated By Reverse Rubbed Polyimide Process, J. Chen, Philip J. Bos, D. L. Johnson, Douglas R. Bryant, J. Li, S. H. Jamal, J. R. Kelly
Four-Domain Twisted Nematic Liquid Crystal Display Fabricated By Reverse Rubbed Polyimide Process, J. Chen, Philip J. Bos, D. L. Johnson, Douglas R. Bryant, J. Li, S. H. Jamal, J. R. Kelly
Philip J. Bos
In Appl. Phys. Lett. 67, 1990 (1995), we proposed a particularly simple four‐domain (4‐D) twisted nematic(TN) liquid crystal display(LCD) device, which is composed of two left‐handed and two right‐handed TN subpixels. The two members of each pair of same handedness subpixels are rotated 180° with respect to each other, resulting in four domains that spatially average one another optically to provide a wide angle of viewing with no gray scale inversion. The optical performance of the 4‐D TN LCD was confirmed by studies of a test cell fabricated by a two‐step SiO x oblique evaporation technique. In this article, …
Modeling And Performance Limits Of A Large Aperture High-Resolution Wavefront Control System Based On A Liquid Crystal Spatial Light Modulator, Xinghua Wang, Bin Wang, Philip J. Bos
Modeling And Performance Limits Of A Large Aperture High-Resolution Wavefront Control System Based On A Liquid Crystal Spatial Light Modulator, Xinghua Wang, Bin Wang, Philip J. Bos
Philip J. Bos
The aberration introduced by the primary optical element of a lightweight large aperture telescope can be corrected with a diffractive optical element called the liquid crystal spatial light modulator. Such aberration is usually very large, which makes the design and modeling of such a system difficult. A method to analyze the system is introduced, and the performance limitation of the system is studied through extensive modeling. An experimental system is demonstrated to validate the analysis. The connection between the modeling data and the experimental data is given.