发明授权
- 专利标题： Dustproof view finder
- 专利标题（中）： 防尘查看器
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申请号： US795179申请日： 1991-11-19
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公开(公告)号： US5250969A公开(公告)日： 1993-10-05
- 发明人: Tetsuya Abe , Katsuhiko Nozaki
- 申请人： Tetsuya Abe , Katsuhiko Nozaki
- 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： JPX2-123879[U] 19901126
- 主分类号： G02B13/06
- IPC分类号： G02B13/06 ; G02B23/14 ; G03B13/02
摘要：
A dustproof view finder in which an image formed by an objective optical system is made erect by an image erecting optical system and is observed through an ocular optical system as an erect image, the optical system including a pair of front and rear optical elements spaced from one another at a predetermined distance to define an aerial space therebetween, and a seal member which encloses the aerial space.
公开/授权文献
- US5759249A Sizing emulsion 公开/授权日：1998-06-02
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