发明授权
- 专利标题: Variable magnification finder
- 专利标题(中): 可变放大倍数
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申请号: US503922申请日: 1995-07-19
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公开(公告)号: US5555431A公开(公告)日: 1996-09-10
- 发明人: Moon-hyun Kim
- 申请人: Moon-hyun Kim
- 申请人地址: KRX Kyeongsangnam-do
- 专利权人: Samsung Aerospace Industries, Ltd.
- 当前专利权人: Samsung Aerospace Industries, Ltd.
- 当前专利权人地址: KRX Kyeongsangnam-do
- 优先权: KRX94-17639 19940721
- 主分类号: G03B13/10
- IPC分类号: G03B13/10 ; G02B13/18 ; G02B15/16 ; G02B15/177 ; G02B23/14 ; G02B25/00 ; G03B13/00 ; G03B13/12 ; G02B15/14
摘要:
A variable magnification finder has an objective lens group having an overall positive power. A first lens group and a second lens group each have a negative refractive power; a third lens group and a fourth lens group each have a positive refractive power; and an eyepiece lens group has a positive power. The second and third lens groups move to zooming from the wide angle position to the telephoto position, and compensate the change of an aberration resulting from such movement of the second and third lens groups.
公开/授权文献
- US5031340A Ski-boot 公开/授权日:1991-07-16
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