发明名称 |
Optical head, optical-information medium driving device, and sensor |
摘要 |
When the tilt of an optical disk is detected using a light source of an optical head, the optical head cannot be simplified enough and an optical-disk tilt cannot be detected adequately. The optical head includes: an LED chip; a light-converging element that converges the light which is emitted from the LED chip upon an optical disk; a light-converging element driving means which drives the light-converging element; and a sensor which detects a tilt or a positional shift of the optical disk. In the sensor, the LED chip is placed on a semiconductor substrate which is provided with a plurality of light-receiving chips; the light emitted from the LED chip irradiates the optical disk; the light which is reflected from the optical disk is received by the plurality of light-receiving chips; and based upon the quantity of light which is received at the plurality of light-receiving chips, a tilt or a positional shift of the optical disk is detected.
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申请公布号 |
US2005041550(A1) |
申请公布日期 |
2005.02.24 |
申请号 |
US20040919239 |
申请日期 |
2004.08.17 |
申请人 |
AIKOH HIDEKI;HAYASHI TAKAO;NAKAMURA TOHRU |
发明人 |
AIKOH HIDEKI;HAYASHI TAKAO;NAKAMURA TOHRU |
分类号 |
G11B7/00;G11B7/08;G11B7/095;(IPC1-7):G11B7/00 |
主分类号 |
G11B7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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