发明授权
- 专利标题: Compact high-zoom-ratio real-image finder
- 专利标题(中): 紧凑型高倍率实时图像采集器
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申请号: US264490申请日: 1994-06-23
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公开(公告)号: US5627618A公开(公告)日: 1997-05-06
- 发明人: Ichiro Kasai , Katsuto Tanaka
- 申请人: Ichiro Kasai , Katsuto Tanaka
- 申请人地址: JPX Osaka
- 专利权人: Minolta Camera Kabushiki Kaisha
- 当前专利权人: Minolta Camera Kabushiki Kaisha
- 当前专利权人地址: JPX Osaka
- 优先权: JPX5-158571 19930629; JPX5-172840 19930713
- 主分类号: G02B15/17
- IPC分类号: G02B15/17 ; G03B13/10 ; G02B15/14
摘要:
A high-zoom-ratio real-image finder is provided with an objective lens system including a first lens unit having a positive power, a second lens unit having a negative power, a third lens unit having a negative power and a fourth lens unit having a positive power. Zooming is performed by moving the second and third lens units always in the same direction. A luminous flux restricting member is integrated with a holder for the second lens unit. A zoom strobe unit moves integrally with a holder for the third lens unit.
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