Liquid crystal shutter with substrates having an optical anisotr

Details Liquid crystal shutter with substrates having an optical anisotr Liquid crystal shutter with substrates having an optical anisotr

1989-04-14

1991-10-08

Miller, Stanley D.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 63, 359 78, 359 82, 359 92, 359 86, 359 93, G02F 1133

Patent

active

050548913

ABSTRACT:
A liquid crystal shutter comprising a light source, a liquid crystal element including a pair of substrates and liquid crystal interposed between the substrates, a pair of polarizing plates formed on the outer surfaces of the substrates, and a heater for heating the liquid crystal element. At least one electrode is formed on the inner surface of either substrate, and an aligning orientating layer is formed on the electrode and the inner surface of the substrate. The polarizing axis of at least one of the polarizing plates extends either parallel or at right angles to the direction of the optical axis of a substrate having an optical anisotropy caused by a temperature gradient created over the liquid crystal element in a direction toward a periphery from a center of the liquid crystal element heated by the heater, and crossing at a certain degree with an arrangement direction of liquid crystal molecules oriented by the aligning orienting layer.

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Molecular Crystals & Liquid Crystals, vol. 139, No. 1-2, 1986, pp. 143-160, Montreux, CH; M. Nagata et al.: "Liquid Crystal Shutters for Printers", Chapters II, IV.
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