发明申请
- 专利标题： SPHERICAL ABERRATION CORRECTION APPROPRIATE POSITION SEARCH APPARATUS, AND SPHERICAL ABERRATION CORRECTION APPROPRIATE POSITION SEARCH METHOD
- 专利标题（中）： 球形异常校正适当的位置搜索装置和球形异常校正适当的位置搜索方法
-
申请号： US13297800申请日： 2011-11-16
-
公开(公告)号： US20120057441A1公开(公告)日： 2012-03-08
- 发明人: Takahiro YAMAGUCHI
- 申请人： Takahiro YAMAGUCHI
- 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
- 优先权： JP2010-092005 20100413
- 主分类号： G11B7/1398
- IPC分类号： G11B7/1398
摘要：
A focus error amplitude obtaining device is configured to obtain amplitudes of a focus error signal. An error amplitude difference calculation device is configured to calculate an error amplitude difference which is a difference between the amplitudes of the focus error signal obtained at two different positions in a moving range of a spherical aberration correction device. An appropriate position search control device is in charge of overall control of structural elements; spherical aberration correction device movement control device, focus error amplitude obtaining device, and error amplitude difference calculation device. The appropriate position search control device decides an appropriate position of the spherical aberration correction device based on the error amplitude difference.
公开/授权文献
信息查询
IPC分类:
