发明授权
- 专利标题: Refractive index distribution type meniscus lens and optics
- 专利标题(中): 折射率分布型弯月透镜和光学元件
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申请号: US823285申请日: 1986-01-28
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公开(公告)号: US4974947A公开(公告)日: 1990-12-04
- 发明人: Nozomu Kitagishi , Hiroki Nakayama
- 申请人: Nozomu Kitagishi , Hiroki Nakayama
- 申请人地址: JPX Tokyo
- 专利权人: Canon Kabushiki Kaisha
- 当前专利权人: Canon Kabushiki Kaisha
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX60-17059 19850131
- 主分类号: G02B9/00
- IPC分类号: G02B9/00 ; G02B3/00 ; G02B9/02 ; G02B9/04
摘要:
A refractive index distribution type meniscus-shaped single lens characterized in that it has a refractive index distribution in which the refractive index decreases along the optic axis thereof from a convex surface to a concave surface and the difference .DELTA.N in refractive index between the convex surface and the concave surface on the optic axis satisfies .DELTA.N.gtoreq.0.15.
公开/授权文献
- US5836595A Combination stepladder/handtruck apparatus 公开/授权日:1998-11-17
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