发明授权
- 专利标题： Optical information recording/reproducing apparatus including means for varying intensity of a preheating light beam
- 专利标题（中）： 光信息记录/重放装置包括用于改变预热光束强度的装置
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申请号： US984740申请日： 1992-12-02
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公开(公告)号： US5297128A公开(公告)日： 1994-03-22
- 发明人: Eiji Yamaguchi , Susumu Matsumura , Hiroaki Hoshi , Masakuni Yamamoto , Hideki Morishima
- 申请人： Eiji Yamaguchi , Susumu Matsumura , Hiroaki Hoshi , Masakuni Yamamoto , Hideki Morishima
- 申请人地址： JPX Tokyo
- 专利权人： Canon Kabushiki Kaisha
- 当前专利权人： Canon Kabushiki Kaisha
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX2-321119 19901127
- 主分类号： G11B11/10
- IPC分类号： G11B11/10 ; G11B7/00 ; G11B7/0045 ; G11B7/125 ; G11B11/105
摘要：
An optical information recording/reproducing apparatus provided with a device for irradiating an information track of an optical information recording medium with a preheating light beam. Simultaneously, a recording/reproducing light beam irradiates a light spot of the preheating light beam on the recording medium. The light intensity of the preheating light beam is varied in accordance with the environmental temperature of the apparatus detected by a detector. By such a construction, the recording/reproducing condition of information is kept constant, irrespective of the environmental temperature.
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