发明授权
- 专利标题: Optical system for optical disc having first and second information
- 专利标题(中): 具有第一和第二信息的光盘的光学系统
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申请号: US752935申请日: 1996-11-20
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公开(公告)号: US5835466A公开(公告)日: 1998-11-10
- 发明人: Yasuhisa Shimoda
- 申请人: Yasuhisa Shimoda
- 申请人地址: JPX Tokyo
- 专利权人: Pioneer Electronic Corporation
- 当前专利权人: Pioneer Electronic Corporation
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX7-328303 19951122
- 主分类号: G11B7/007
- IPC分类号: G11B7/007 ; G11B7/09 ; G11B7/125 ; G11B19/12 ; G11B7/00
摘要:
There is provided an optical pickup controlling system for an optical disc player. The optical disc player is adapted to direct a laser beam on to an optical disc which contains a first information recorded thereon in terms of information pits formed on information tracks and a second information recorded thereon in terms of shapes of information tracks. Here, the laser beam may have a first beam spot or a second beam spot, the second beam spot is for reproducing the second information, the second beam spot is narrower in a direction orthogonal to the information track direction than the first beam spot which is for reproducing or recording the first information. In detail, the first beam spot is in an elliptical shape having its shorter axis arranged in the information track direction, the second beam spot is in another elliptical shape having its shorter axis arranged in a direction orthogonal to the information track direction.
公开/授权文献
- US5204666A Indication display unit for vehicles 公开/授权日:1993-04-20