发明授权
- 专利标题： Objective lens system of optical information recording/reproducing apparatus
- 专利标题（中）： 光学信息记录/再现装置的物镜系统
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申请号： US769764申请日： 1991-10-04
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公开(公告)号： US5173809A公开(公告)日： 1992-12-22
- 发明人: Makoto Iwaki , Koichi Maruyama
- 申请人： Makoto Iwaki , Koichi Maruyama
- 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： JPX1-47589 19890228; JPX1-47590 19890228
- 主分类号： G02B13/18
- IPC分类号： G02B13/18 ; G02B13/24 ; G02B27/00 ; G11B7/135
摘要：
An object lens system consists of a converging lens which has both surfaces formed of a convex aspherical surface and having a radius of curvature which is increased as it goes toward the periphery from the center thereof, and a chromatic aberration correcting element having almost no power disposed towards said light source side of said converging lens and adapted to correct a chromatic aberration of said converging lens.
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