发明授权
US08547814B2 Semiconductor laser device, optical pickup apparatus, and method of manufacturing semiconductor laser device
有权
半导体激光装置，光学拾取装置以及半导体激光装置的制造方法
- 专利标题： Semiconductor laser device, optical pickup apparatus, and method of manufacturing semiconductor laser device
- 专利标题（中）： 半导体激光装置，光学拾取装置以及半导体激光装置的制造方法
-
申请号： US13228222申请日： 2011-09-08
-
公开(公告)号： US08547814B2公开(公告)日： 2013-10-01
- 发明人: Shinzoh Murakami , Mototaka Taneya , Takahide Ishiguro , Katsushige Masui , Satoru Fukumoto , Takeshi Horiguchi
- 申请人： Shinzoh Murakami , Mototaka Taneya , Takahide Ishiguro , Katsushige Masui , Satoru Fukumoto , Takeshi Horiguchi
- 申请人地址： JP Osaka-shi
- 专利权人： Sharp Kabushiki Kaisha
- 当前专利权人： Sharp Kabushiki Kaisha
- 当前专利权人地址： JP Osaka-shi
- 代理机构： Morrison & Foerster LLP
- 优先权： JP2010-203758 20100910; JP2010-259583 20101119
- 主分类号： G11B7/00
- IPC分类号： G11B7/00
摘要：
In a diffractive element, its grating pattern is so configured that a diffraction angle of a diffracted light beam of a light source that is subject to the first-order diffraction in a diffraction area is matched with an angle of a light beam passing through the diffractive area emitted from a light source and a light source position is matched with a light originating point of the light source that emits a light beam to be transmitted, and the center of light intensity distribution is matched with that of the light source passing through the diffractive element by inclining an optical axis of the light source. A position of the diffractive element is adjusted based on an electric current value generated when a reflected return path light beam of the light source is diffracted by the diffractive element and enters the light source.