发明授权
US5138604A Optical recording method having two degrees of reflectivity and a
diffraction grating or hologram formed integrally thereon and process
for making it
失效
具有两度反射率的光学记录方法和一体化成像的衍射光栅或激光成像方法及其制造方法
- 专利标题： Optical recording method having two degrees of reflectivity and a diffraction grating or hologram formed integrally thereon and process for making it
- 专利标题（中）： 具有两度反射率的光学记录方法和一体化成像的衍射光栅或激光成像方法及其制造方法
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申请号： US445638申请日： 1989-12-07
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公开(公告)号： US5138604A公开(公告)日： 1992-08-11
- 发明人: Kazuo Umeda , Yuji Kondo , Toshiharu Ishikawa
- 申请人： Kazuo Umeda , Yuji Kondo , Toshiharu Ishikawa
- 申请人地址： JPX Tokyo
- 专利权人： Dai Nippon Insatsu Kabushiki Kaisha
- 当前专利权人： Dai Nippon Insatsu Kabushiki Kaisha
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX63-90028 19880412
- 主分类号： B42D15/10
- IPC分类号： B42D15/10 ; G07F7/08 ; G11B7/0033 ; G11B7/0065 ; G11B7/24 ; G11B7/26
摘要：
An optical recording medium of the present invention has on a substrate information recording patterns (2) and (3) distinguishable by a difference in light reflectivity, and is characterized in that said information recording pattern (2) is comprised of a portion (2a) of high reflectivity and a portion (2b) of low reflectivity and at least a part of said information recording patterns is formed by a diffraction grating or hologram (3). Since such plural types of information can be formed at the same time and at high density, the present invention has a merit of its having excellent fake-proofness and its manufacturing process being simplified.