Electro-optic properties for liquid crystal phase gratings

Hideya Murai; Tomohisa Gotoh; Masayoshi Suzuki; Etsuo Hasegawa; Katsuhiro Mizoguchi

doi:10.1117/12.60404

15 June 1992 Electro-optic properties for liquid crystal phase gratings

Hideya Murai, Tomohisa Gotoh, Masayoshi Suzuki, Etsuo Hasegawa, Katsuhiro Mizoguchi

Proceedings Volume 1665, Liquid Crystal Materials, Devices, and Applications; (1992) https://doi.org/10.1117/12.60404
Event: SPIE/IS&T 1992 Symposium on Electronic Imaging: Science and Technology, 1992, San Jose, CA, United States

Abstract

A new type of liquid crystal device was developed by applying a concept of liquid crystal phase gratings (LCPGs). LCPGs are composed of square-wave phase gratings constructed with poly(methyl methacrylate) and liquid crystals which fill the grating grooves. The typical sizes of the phase grating are 10 micrometers in width and 2 micrometers in depth. The transmitted light wavelength can be easily controlled by changing applied voltage. The transmittance varied from less than 1 for monochromatic polarized light, when applied voltage varied from 0 V to 5 V. Rise times for the light varied from 0.2 ms to 7 ms with applied voltage, and were inversely proportional to the square of the applied voltage. Decay times, which depend slightly on the applied voltage, were about 4 ms. A transmitted light, i.e., an observed color (e.g., R,G,B and white), was dependent on not only applied voltage but also grating depth. When two of the LCPGs were combined in such a way that their grating lines were oriented perpendicular to each other, these LCPGs were applicable to nonpolarized light.

Citation Download Citation

Hideya Murai, Tomohisa Gotoh, Masayoshi Suzuki, Etsuo Hasegawa, and Katsuhiro Mizoguchi "Electro-optic properties for liquid crystal phase gratings", Proc. SPIE 1665, Liquid Crystal Materials, Devices, and Applications, (15 June 1992); https://doi.org/10.1117/12.60404

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