发明名称 |
Variable power finder |
摘要 |
A variable power finder having an objective lens of positive refracting power comprising a first lens unit of positive refracting power movable along an optical axis and a second lens unit releasably attached to the first lens unit in axial alignment, wherein a real image to be observed is formed by the objective lens.
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申请公布号 |
US4751539(A) |
申请公布日期 |
1988.06.14 |
申请号 |
US19870080570 |
申请日期 |
1987.07.31 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
YAMADA, YASUYUKI;SATO, YASUHISA;NAKAYAMA, HIROKI;OIZUMI, KOUJI |
分类号 |
G02B15/04;G02B23/14;(IPC1-7):G03B13/12 |
主分类号 |
G02B15/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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