发明名称 |
OPTICAL INFORMATION DEVICE |
摘要 |
An optical information apparatus according to the present invention includes: an optical system that includes a solid immersion lens (SIL) 11 and that produces near-field light to be incident on an optical disc 10; a first actuator for displacing the SIL 11; a second actuator 29 for varying the distance between the optical disc 10 and the first actuator 12 by moving the first actuator 12; a gap detecting section 18 for outputting a gap signal 19 representing the magnitude of the gap 17 between the SIL 11 and the optical disc 10; and a gap control system for controlling the first actuator 12 in response to the gap signal 19 such that the gap is maintained at a predetermined setting. The gap control system works so as to control the second actuator 29 in accordance with a signal representing the magnitude of displacement of the SIL 11 caused by the first actuator 12.
|
申请公布号 |
US2009310467(A1) |
申请公布日期 |
2009.12.17 |
申请号 |
US20070374384 |
申请日期 |
2007.10.30 |
申请人 |
FUTAKUCHI RYUTARO;BIRUKAWA MASAHIRO |
发明人 |
FUTAKUCHI RYUTARO;BIRUKAWA MASAHIRO |
分类号 |
G11B7/00 |
主分类号 |
G11B7/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|