Invention Grant
- Patent Title: Large aperture zoom optical system and image pickup apparatus
- Patent Title (中): 大光圈变焦光学系统和摄像装置
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Application No.: US13495822Application Date: 2012-06-13
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Publication No.: US08947791B2Publication Date: 2015-02-03
- Inventor: Shoji Kogo , Yasushi Yamamoto , Kana Inoue
- Applicant: Shoji Kogo , Yasushi Yamamoto , Kana Inoue
- Applicant Address: JP Tokyo
- Assignee: Konica Minolta Advanced Layers, Inc.
- Current Assignee: Konica Minolta Advanced Layers, Inc.
- Current Assignee Address: JP Tokyo
- Agent Cozen O'Connor
- Priority: JP2011-130825 20110613
- Main IPC: G02B9/60
- IPC: G02B9/60 ; G02B15/14 ; G02B15/173 ; G02B27/64
Abstract:
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.
Public/Granted literature
- US20120314291A1 Large Aperture Zoom Optical System and Image Pickup Apparatus Public/Granted day:2012-12-13
Information query
