Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1993-03-18
1994-05-10
Gross, Anita P.
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359104, 359105, 25229901, G02F 1137, G02F 113, C09K 1952
Patent
active
053113438
ABSTRACT:
A liquid crystal device is constituted by (a) a pair of base plates each having an orientation control film thereon, and (b) a liquid crystal composition interposed between the base plates. The liquid crystal composition comprises a mixture including at least one liquid crystal compound which has a temperature range in which it shows chiral smectic phase and at least one optically active substance which does not have a temperature range in which it shows chiral smectic phase. The liquid crystal composition has a temperature range in which it shows cholesteric phase and is placed in chiral smectic phase which has been formed through cholesteric phase on temperature decrease. The liquid crystal composition comprises liquid crystal molecules having long axes forming a pre-tilt in the chiral smectic phase.
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Kanbe Junichiro
Katagiri Kazuharu
Okada Shinjiro
Yoshinaga Kazuo
Canon Kabushiki Kaisha
Gross Anita P.
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