| Original document(47 pages) 中文版 |
The present invention provides liquid crystal lens element comprising no movable part, having a small size, having a lens function capable of being subjected to stable spherical aberration correction including the power component corresponding to the focus variation of the incident light. The liquid crystal lens element has a variable focal length to the light transmitted through a liquid crystal(16) interposed between a pair of transparent substrates(11, 12). The variable focal length can be varied with the voltage applied to the liquid crystal(16). The liquid crystal lens comprises transparent electrodes(13, 14) provided to the respective transparent substrates(11, 12) and used to apply a voltage to the liquid crystal(16) and an irregular part(17) which has a serrated cross section and a rotational symmetry with respect to the optical axis and is formed of a transparent material on one side of the transparent electrode(13). The liquid crystal(16) is placed at least in the recesses of the irregular part(17) so as to vary the substantial index of refraction of the liquid crystal(16) depending on the applied voltage. |
Application Number
申请号 |
200580003541 |
Application Date
申请日 |
2005.02.02 |
| Title 名称 |
Liquid crystal lens element and optical head device |
Publication Number
公开号 |
1914674 |
Publication Date
公开日 |
2007.02.14 |
| Approval Pub. Date |
|
Granted Pub. Date |
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| International Classification 分类号 |
G11B7/135;G02F1/13;G11B7/125 |
Applicant(s) Name
申请人 |
Asahi Glass Co., Ltd. |
| Address 地址 |
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| Inventor(s) Name 发明人 |
Ooi Yoshiharu;Sato Hiromasa;Shimizu Ryuichiro;Nomura Takuji;Tanabe Yuzuru;Oosawa Mitsuo |
| Attorney & Agent 代理人 |
shen zhaokun |
| More information 更 多 信 息 |
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