发明授权
- 专利标题： Optical system of optical information recording/reproducing apparatus
- 专利标题（中）： 光信息记录/再现装置的光学系统
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申请号： US527975申请日： 1995-09-14
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公开(公告)号： US5657171A公开(公告)日： 1997-08-12
- 发明人: Koichi Maruyama , Makoto Iwaki
- 申请人： Koichi Maruyama , Makoto Iwaki
- 申请人地址： JPX Tokyo
- 专利权人： Asahi Kogaku Kogyo Kabushiki Kaisha
- 当前专利权人： Asahi Kogaku Kogyo Kabushiki Kaisha
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX1-30775 19890209; JPX1-47590 19890228; JPX1-202558 19890803
- 主分类号： G02B27/00
- IPC分类号： G02B27/00 ; G11B7/135 ; G02B9/04
摘要：
An optical system of an optical information recording/reproducing apparatus including a light source, an objective lens, and a chromatic aberration correcting element is provided and also includes a mechanism for independently actuating the objective lens. A beam splitter for splitting the luminous flux reflected by a medium can also be provided. The chromatic aberration correcting element is formed of a positive lens and a negative lens cemented together and satisfies the relation .vertline.n.sub.p -n.sub.n .vertline..times.10.sup.-5
公开/授权文献
- US5249179A Echo canceller system suitable for a 2B1Q transmission code 公开/授权日：1993-09-28
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