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US 4,900,135 AGranted
Optical element
AssigneeCanon Kabushiki Kaisha
InventorsSatoshi Yuasa, Yukuo Nishimura, Yoko Yoshinaga, Hirohide Munakata, Masahiro Haruta
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Abstract
An optical element comprised a pair of plates between which an optical modulation liquid layer is sandwiched, the optical modulation liquid layer exhibiting a light scattering property caused by suspension of fine particle polymer when not heated and exhibiting transparency caused by dissolution of fine particle polymer when heated, the change of such light scattering property to transparency being reversible.
Claims11
An optical element comprising:
- a pair of plates between which an optical modulation liquid layer is sandwiched, the optical modulation liquid layer exhibiting a light scattering property caused by suspension of fine particle polymer when not heated and exhibiting transparency caused by dissolution of fine particle polymer when heated, the change of such light scattering property to transparency being reversible, wherein the optical modulation liquid layer contains a light-absorbing heat-generating agent.
Dependencies are inferred from the claim text.