发明授权
- 专利标题： Finder optical system
- 专利标题（中）： Finder光学系统
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申请号： US680548申请日： 1991-04-04
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公开(公告)号： US5184252A公开(公告)日： 1993-02-02
- 发明人: Yuji Miyauchi , Shinichi Yoshii , Tatsuru Kanamori
- 申请人： Yuji Miyauchi , Shinichi Yoshii , Tatsuru Kanamori
- 申请人地址： JPX Tokyo
- 专利权人： Olympus Optical Co., Ltd.
- 当前专利权人： Olympus Optical Co., Ltd.
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX2-91771 19900406; JPX2-91772 19900406
- 主分类号： G02B13/18
- IPC分类号： G02B13/18 ; G02B23/14
摘要：
A finder optical system including an objective having a positive refractive power, an image erecting optical member for erecting an image formed by the objective, and an eyepiece for allowing observation of the image formed by the objective and erected by the image erecting optical member. The objective consists of a first positive lens component and a second negative lens component, or a single lens having a convex surface on the object side. This finder optical system has a simple composition, a compact external design and a relatively wide field angle.
公开/授权文献
- US5692266A Concealable and expandable handle 公开/授权日：1997-12-02
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