发明名称 |
LIQUID CRYSTAL LENS ELEMENT AND OPTICAL HEAD DEVICE |
摘要 |
A liquid crystal lens element having a lens function is provided, which is small sized without having moving part, and which can stably carry out correction of spherical aberration containing a power component corresponding to focal point change of incident light. A liquid crystal lens element which changes a focal length of light transmitted through a liquid crystal 16 according to the magnitude of the voltage applied to the liquid crystal 16 sandwiched between a pair of transparent substrates 11 and 12, which comprises transparent electrodes 13 and 14 provided on the respective transparent substrates 11 and 12 for applying a voltage for the liquid crystal 16, and a concave-convex portion 17 having a saw-tooth-shaped cross-sectional shape having a rotational symmetry about an optical axis and formed on one surface of the transparent electrode 13 with a transparent material, wherein at least concave portions of the concave-convex portion 17 are filled with the liquid crystal 16 so as to change the substantial refractive index of the liquid crystal 16 according to the magnitude of applied voltage.
|
申请公布号 |
EP1713067(A1) |
申请公布日期 |
2006.10.18 |
申请号 |
EP20050709648 |
申请日期 |
2005.02.02 |
申请人 |
ASAHI GLASS COMPANY, LIMITED |
发明人 |
OOI, YOSHIHARU;SATO, H.;SHIMIZU, R.;NOMURA, T.;TANABE, YUZURU;OOSAWA, M. |
分类号 |
G02F1/13;G02F1/1335;G02F1/29;G11B7/125;G11B7/135 |
主分类号 |
G02F1/13 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|