Optical element, process for production thereof, substrate for liquid crystal alignment, liquid crystal display device, and birefringent material
First Claim
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1. An optical element comprising:
- a birefringence layer comprising a chiral agent and a polymerizable liquid crystal comprised of rodlike molecules; and
a light transparent base material for supporting the birefringence layer, said polymerizable liquid crystal having a molecular arrangement which has been fixed by crosslinking while holding a planar cholesteric phase structure, a substrate layer underlying said birefringence layer being formed of glass or silicon oxide.
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Abstract
There is provided an optical element which has desired birefringence characteristics and, at the same time, has a low haze value. The optical element comprises: a birefringence layer comprising a chiral agent and a polymerizable liquid crystal comprised of rodlike molecules; and a light transparent base material for supporting the birefringence layer. The polymerizable liquid crystal has a molecular arrangement which has been fixed by crosslinking while holding a planar cholesteric phase structure. A substrate layer underlying the birefringence layer is formed of glass or silicon oxide.
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13 Claims
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1. An optical element comprising:
- a birefringence layer comprising a chiral agent and a polymerizable liquid crystal comprised of rodlike molecules; and
a light transparent base material for supporting the birefringence layer,said polymerizable liquid crystal having a molecular arrangement which has been fixed by crosslinking while holding a planar cholesteric phase structure, a substrate layer underlying said birefringence layer being formed of glass or silicon oxide. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- a birefringence layer comprising a chiral agent and a polymerizable liquid crystal comprised of rodlike molecules; and
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8. A substrate for liquid crystal alignment, comprising at least a light transparent base material and an aligning film provided on one side of said light transparent base material, wherein
a birefringence layer is provided between said light transparent base material and said aligning film or on the base material in its surface remote from said aligning film, said birefringence layer comprises a chiral agent and a polymerizable liquid crystal comprised of rodlike molecules, and the molecular arrangement of the polymerizable liquid crystal has been fixed by crosslinking while holding a planar cholesteric phase structure, and a substrate layer underlying said birefringence layer is formed of glass or silicon oxide.
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13. A birefringent material comprising a chiral agent, a polymerizable liquid crystal comprised of rodlike molecules, and a silane coupling agent, wherein the molecular arrangement of said polymerizable liquid crystal has been fixed by crosslinking while holding a planar cholesteric phase structure.
Specification