发明名称 Photomagnetic recording device and photomagnetic reproducing device
摘要 In a photomagnetic recording device where a record light beam irradiates a photomagnetic record medium to form a pit on the photomagnetic record medium, and a reproducing light beam irradiates the pit to reproduce the record information, the record light beam is pulsed intermittently at least at the beginning of the irradiation period so that a pit of substantially circular shape is formed on the photomagnetic record medium, whereby information is recorded with high accuracy.
申请公布号 US5640379(A) 申请公布日期 1997.06.17
申请号 US19910646222 申请日期 1991.01.28
申请人 SONY CORPORATION 发明人 TATSUZAWA, KAICHI;TANAKA, SHOSUKE;KOIKE, SHIGEAKI
分类号 G11B7/0045;G11B11/105;(IPC1-7):G11B7/00 主分类号 G11B7/0045
代理机构 代理人
主权项
地址