发明授权
US5334849A Apparatus for and method of verifying etching of optical servo
information on magnetic media
失效
用于验证磁性介质上光学伺服信息的蚀刻的装置和方法
- 专利标题： Apparatus for and method of verifying etching of optical servo information on magnetic media
- 专利标题（中）： 用于验证磁性介质上光学伺服信息的蚀刻的装置和方法
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申请号： US896197申请日： 1992-06-10
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公开(公告)号： US5334849A公开(公告)日： 1994-08-02
- 发明人: Fred C. Thomas , James Bero , Robert Short , Paul R. Johnson
- 申请人： Fred C. Thomas , James Bero , Robert Short , Paul R. Johnson
- 申请人地址： UT Roy
- 专利权人： Iomega Corporation
- 当前专利权人： Iomega Corporation
- 当前专利权人地址： UT Roy
- 主分类号： G11B11/10
- IPC分类号： G11B11/10 ; B23K26/03 ; G11B5/596 ; G11B5/82 ; G11B11/105 ; G11B13/04 ; G11B21/10 ; G11B33/10 ; G01D5/34
摘要：
An apparatus and method for etching a point on the surface of a magnetic medium to reduce the reflectivity of the point and for verifying that proper etching occurred. A light source provides a collimated incident beam of light. The incident beam is focused to a point on the medium and a portion of the beam is reflected. The reflected beam is separated from the incident beam and the intensity of the reflected beam is measured. The measured intensity is compared to a threshold value and verification is indicated if the measured intensity exceeds the threshold value.
公开/授权文献
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