发明授权
- 专利标题: Wide angle objective
- 专利标题(中): 广角目标
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申请号: US492413申请日: 1974-07-29
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公开(公告)号: US3975090A公开(公告)日: 1976-08-17
- 发明人: John A. Lawson
- 申请人: John A. Lawson
- 申请人地址: CA Santa Monica
- 专利权人: Optigon Research & Development Corporation
- 当前专利权人: Optigon Research & Development Corporation
- 当前专利权人地址: CA Santa Monica
- 主分类号: G02B7/10
- IPC分类号: G02B7/10 ; G02B13/00 ; G02B13/04 ; G02B9/64
摘要:
A wide angle lens of the retrofocus type comprising six lens groups in front and rear groupings. The rear grouping is movable forward while the front grouping is stationary to focus the lens to within ten equivalent focal lengths of the lens.
公开/授权文献
- US5021526A Anionic polymeric stabilizers for oil-in-water emulsions 公开/授权日:1991-06-04
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