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.
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
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