Optical element and process for producing the same
AssigneeFuji Xerox Co., Ltd.
InventorsRyojiro Akashi, Masanobu Ninomiya, Takashi Uematsu, Takashi Morikawa
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Abstract
An optical element comprising a polymer liquid crystal composition having an optically anisotropic multi-domain structure which is formed by crosslinking a composition containing a polymer liquid crystal. Since the multi-domain structure is stabilized by crosslinking, the element exhibits excellent reproducibility in restoring white turbidity.
Claims21
An optical element comprising a polymer liquid crystal composition having a multi-domain structure comprising crosslinked domains, each of said domains comprising liquid crystal molecules oriented substantially in one direction to produce optical anisotropy, wherein said multi-domain structure has such a domain size distribution that the domain diameter at the maximum in the frequency distribution of domain diameter is not greater than 3 .mu.m.
A process for producing an optical element comprising subjecting a polymer liquid crystal composition to heat treatment to control a domain size of a multi-domain structure and crosslinking said composition while retaining said multi-domain structure.
An optical element comprising a polymer liquid crystal composition, wherein said composition has previously formed thereon an erasable image and an unerasable image, wherein said unerasable image is formed by an image having no light scattering properties on at least a part of said optical element and then crosslinking said composition to make said image having no light scattering properties unerasable.
An image formation method comprising forming an image having no light scattering properties on an optical element comprising a light scattering-polymer liquid crystal composition having a multi-domain structure comprising crosslinked domains, each of said domains comprising liquid crystal molecules oriented substantially in one direction to produce optical anisotropy, wherein said multi-domain structure has a domain size distribution that the domain diameter at the maximum in the frequency distribution of domain diameter is not greater than 3 microns and then crosslinking said composition to make said image having no light scattering properties unerasable.
An image formation method comprising forming an erasable image and an unerasable image on an optical element comprising a light scattering-polymer liquid crystal composition, wherein said unerasable image is formed by an image having no light scattering properties and crosslinking said composition to make said image having no light scattering properties unerasable.
Dependencies are inferred from the claim text.