发明名称 |
Apparatus and method for position control of optical system and storage and reproduction apparatus |
摘要 |
A position control apparatus of an optical system capable of positioning a lens at a high accuracy in a near-field optical system using a solid immersion lens. An objective lens 2 and a solid immersion lens are fixed to a lens holder 4. The lens holder 4 is moved by a tracking actuator 5 in the tracking direction of an optical disk 51 and is moved by a focus actuator 8 in the focus direction. The focus actuator 8 is controlled on the basis of the electrostatic capacitance occurring between the solid immersion lens 3 and the optical disk 51. <IMAGE> |
申请公布号 |
EP1130440(A3) |
申请公布日期 |
2002.07.24 |
申请号 |
EP20010103740 |
申请日期 |
2001.02.15 |
申请人 |
SONY CORPORATION |
发明人 |
ICHIMURA, ISAO;KISHIMA, KOICHIRO;OSATO, KIYOSHI |
分类号 |
G11B11/24;G01B7/02;G01B7/14;G01Q60/22;G11B7/085;G11B7/09;G11B7/135;G11B11/105 |
主分类号 |
G11B11/24 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|