Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1989-10-02
1992-11-17
Miller, Stanley D.
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359 74, 359100, G02F 11333, G02F 11337, G02F 113
Patent
active
051650762
ABSTRACT:
A ferroelectric liquid crystal device comprises a pair of opposite electrodes and a ferroelectric liquid crystal disposed between the electrodes. At least one of the opposite electrodes is coated with a primer layer and an alignment layer on the primer layer. The alignment layer has a thickness d.sub.2 and is made of a material having a dielectric constant .epsilon..sub.2, and the primer layer has a thickness d.sub.1 and is made of a material having a dielectric constant .epsilon..sub.1 which are greater than d.sub.2 and .epsilon..sub.2, respectively. The ferroelectric liquid crystal is at least one mesomorphic compound represented by the formula R.sub.1 --A.sub.1 --X--A.sub.2 --R.sub.2 wherein A.sub.1 and A.sub.2 respectively denote a 6-membered ring-containing divalent group; X denotes a single bond or a divalent chain group; and R.sub.1 and R.sub.2 respectively denote a branch or linear chain group, R.sub.1 and R.sub.2 being the same or different.
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Hanyu Yukio
Inaba Yutaka
Tsuboyama Akira
Uchimi Toshiharu
Yamashita Masataka
Canon Kabushiki Kaisha
Gross Anita Pellman
Miller Stanley D.
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