Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1992-10-05
1994-10-04
Gross, Anita P.
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359 78, 359100, G02F 11337, G02F 113
Patent
active
053531418
ABSTRACT:
A liquid crystal device, particularly a ferroelectric liquid crystal device, is constituted by disposing a liquid crystal disposed between a pair of rubbing-treated substrates. The uniaxial alignment control force exerted by rubbing is gradually weakened as the rubbing treatment is successively applied to a large number of substrates. This is compensated by varying a rubbing condition, such as a relative moving speed, a rotational speed, or a pressing depth against the substrate of a rubbing roller. Alternatively, such a change in uniaxial alignment control force with time may be utilized for compensating for a difference in uniaxial alignment control force attributable to a difference in stripe electrode extension relative to the rubbing direction.
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Hanyu Yukio
Kodera Yasuto
Onuma Kenji
Wada Takatsugu
Yoshioka Mayumi
Canon Kabushiki Kaisha
Gross Anita P.
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