发明授权
- 专利标题： Optical head device, aberration correction method and optical information processing apparatus
- 专利标题（中）： 光头装置，像差校正方法和光信息处理装置
-
申请号： US11905927申请日： 2007-10-05
-
公开(公告)号： US07848208B2公开(公告)日： 2010-12-07
- 发明人: Eishin Mori , Hideki Aikoh , Joji Anzai , Kousei Sano
- 申请人： Eishin Mori , Hideki Aikoh , Joji Anzai , Kousei Sano
- 申请人地址： JP Osaka
- 专利权人： Panasonic Corporation
- 当前专利权人： Panasonic Corporation
- 当前专利权人地址： JP Osaka
- 代理机构： Wenderoth, Lind & Ponack, L.L.P.
- 优先权： JP2006-273819 20061005
- 主分类号： G11B7/00
- IPC分类号： G11B7/00
摘要：
An optical head device is provided with a semiconductor laser, an aberration correcting element for transmitting a beam from the semiconductor laser, a light guiding portion for introducing the beam from the semiconductor laser to the aberration correcting element, and an objective lens for focusing the beam having passed through the aberration correcting element on an optical disc. The aberration correcting element corrects a longitudinal chromatic aberration occurring in the objective lens and a longitudinal chromatic aberration occurring in the light guiding portion excluding the objective lens and the aberration correcting element based on a longitudinal chromatic aberration occurring in the aberration correcting element when the semiconductor laser emits a beam having a wavelength different by a specified wavelength difference.Therefore, an optical head device, an aberration correction method and an optical information processing apparatus can be provided which can suppress a longitudinal chromatic aberration occurring in the entire optical system from a light source to an objective lens.
公开/授权文献
信息查询
IPC分类:
