发明名称 |
Optical head, optical element with diffraction grating, optical disc device and information processing device |
摘要 |
An optical head includes a blue-violet laser light source for emitting a blue-violet laser beam, a mirror with a diffraction grating for transmitting and reflecting the blue-violet laser beam at a predetermined ratio, and a front monitor sensor for receiving transmitted light or reflected light from the mirror with a diffraction grating and creating an APC signal for controlling an output of the blue-violet laser light source. The mirror with a diffraction grating includes a first surface which the blue-violet laser beam enters, and a second surface facing the first surface. The first surface and the second surface are mutually parallel. A reflecting coat for transmitting and reflecting the blue-violet laser beam at a predetermined ratio is formed on the first surface, and a diffraction grating is formed on the second surface. |
申请公布号 |
US8134907(B2) |
申请公布日期 |
2012.03.13 |
申请号 |
US20090739245 |
申请日期 |
2009.08.11 |
申请人 |
YAMASAKI FUMITOMO;KOMMA YOSHIAKI;TOJO TOMOAKI;PANASONIC CORPORATION |
发明人 |
YAMASAKI FUMITOMO;KOMMA YOSHIAKI;TOJO TOMOAKI |
分类号 |
G11B7/00;G11B7/125 |
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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