发明授权
- 专利标题： Pulse train condition/heat shut off condition determination method and apparatus for optical recording, and optical recording method and apparatus
- 专利标题（中）： 脉冲序列条件/热关闭条件确定方法和光学记录装置，以及光学记录方法和装置
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申请号： US526875申请日： 1995-09-12
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公开(公告)号： US5561642A公开(公告)日： 1996-10-01
- 发明人: Jun Saito , Shinichi Kurita
- 申请人： Jun Saito , Shinichi Kurita
- 申请人地址： JPX Tokyo
- 专利权人： Nikon Corporation
- 当前专利权人： Nikon Corporation
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX4-282105 19921021; JPX4-282106 19921021; JPX5-232634 19930920
- 主分类号： G11B7/00
- IPC分类号： G11B7/00 ; G11B7/0045 ; G11B7/125 ; G11B11/105 ; G11B11/00
摘要：
This invention relates to an optical recording method and apparatus, in which the intensity of a laser beam to be radiated onto an optical recording medium is raised from an intensity P.sub.pre for maintaining a pre-heat state in which the temperature of the medium surface becomes a predetermined temperature, to P.sub.W1 higher than P.sub.pre, the intensity is reduced to an intensity P.sub.LT lower than P.sub.W1 after P.sub.W1 is maintained for a time T.sub.W1, and thereafter, the laser beam is intensity-modulated between P.sub.LT and an intensity P.sub.W2 higher than P.sub.LT so as to form a mark on the optical recording medium. When at least one of P.sub.W2, P.sub.LT, and a time T.sub.W2 for maintaining P.sub.W2 is controlled, the medium temperature, after an elapse of T.sub.W1, at the peak temperature position or the spot center position of the laser beam radiated onto the medium surface is equal to the medium temperature after an elapse of T.sub.W2.