发明申请
- 专利标题： Large Aperture Zoom Optical System and Image Pickup Apparatus
- 专利标题（中）： 大孔径变焦光学系统和图像拾取装置
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申请号： US13495822申请日： 2012-06-13
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公开(公告)号： US20120314291A1公开(公告)日： 2012-12-13
- 发明人: Shoji Kogo , Yasushi Yamamoto , Kana Inoue
- 申请人： Shoji Kogo , Yasushi Yamamoto , Kana Inoue
- 申请人地址： JP Tokyo
- 专利权人： Konica Minolta Advanced Layers, Inc.
- 当前专利权人： Konica Minolta Advanced Layers, Inc.
- 当前专利权人地址： JP Tokyo
- 优先权： JP2011-130825 20110613
- 主分类号： G02B15/14
- IPC分类号： G02B15/14 ; G02B27/64
摘要：
A large aperture zoom optical system and an image pickup apparatus have a five-lens-group arrangement of positive-negative-positive-negative-positive refractive powers. At the time of zooming, the fifth lens group is fixed, and at least the second lens group, the third lens group and the fourth lens group are moved. The third lens group for use in focusing is composed of a single lens element.
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