发明授权
- 专利标题: Optical recording apparatus
- 专利标题(中): 光记录装置
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申请号: US408678申请日: 1982-08-16
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公开(公告)号: US4532522A公开(公告)日: 1985-07-30
- 发明人: Yoshito Tsunoda , Takeshi Maeda , Shigeru Nakamura , Toshimitsu Kaku
- 申请人: Yoshito Tsunoda , Takeshi Maeda , Shigeru Nakamura , Toshimitsu Kaku
- 申请人地址: JPX Tokyo
- 专利权人: Hitachi, Ltd.
- 当前专利权人: Hitachi, Ltd.
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX56-134070 19810828
- 主分类号: G02B27/42
- IPC分类号: G02B27/42 ; G11B7/00 ; G11B7/004 ; G11B7/08 ; G11B7/09 ; G11B7/095 ; G11B7/125 ; G11B21/10
摘要:
An optical recording apparatus wherein in front and rear of a first light spot for recording predetermined information along a guide groove provided in a recording medium beforehand, two second light spots and two third light spots are arranged along the guide groove and in a manner to mutually deviate from the center of the guide groove; the second light spots are arranged in an area with no information recorded therein, while the third light spots are arranged in an area with the information recorded therein; and the position of the first light spot is controlled on the basis of the difference between the quantities of light of the second light spots and the difference between the quantities of light of the third light spots, so as to track the information.
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