发明授权
- 专利标题： Electron beam recording and reproducing apparatus
- 专利标题（中）： 电子束记录和再现装置
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申请号： US13798申请日： 1987-02-12
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公开(公告)号： US4786922A公开(公告)日： 1988-11-22
- 发明人: Shigeyuki Hosoki , Keiji Takata , Toshiyuki Aida , Sumio Hosaka
- 申请人： Shigeyuki Hosoki , Keiji Takata , Toshiyuki Aida , Sumio Hosaka
- 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： JPX61-30819 19860217
- 主分类号： G11B9/00
- IPC分类号： G11B9/00 ; G11B9/10 ; G11B9/14 ; G11B11/03 ; G11B11/08
摘要：
An electron beam recording and reproducing apparatus which radiates the electron beam emitted from a needle cathode to a disc for recording and reproduction is disclosed. The needle cathode moves on the disc. A magnetic field is applied in the axial direction of the needle cathode in order to converge and radiate the electron beam emitted from the needle cathode to the disc.