发明授权
- 专利标题: Fully closing iris diaphragm
- 专利标题(中): 完全关闭IRIS DIAPHRAGM
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申请号: US34011773申请日: 1973-03-12
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公开(公告)号: US3836234A公开(公告)日: 1974-09-17
- 发明人: FARNSWORTH J
- 申请人: RANK ORGANISATION LTD
- 专利权人: Rank Organisation Ltd
- 当前专利权人: Rank Organisation Ltd
- 优先权: GB2309672 1972-05-17
- 主分类号: G03B9/08
- IPC分类号: G03B9/08 ; G02F1/30 ; G03B9/02
摘要:
A fully-closing iris diaphragm is disclosed which consists of a substantially conventional iris diaphragm with the addition of a capping section to one leaf, which is positioned to obscure the minimum aperture obtainable without ''''scissoring'''' distortion of the leaves.
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