Invention Grant
- Patent Title: Zoom lens system, imaging device and camera
- Patent Title (中): 变焦镜头系统,成像设备和相机
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Application No.: US13604633Application Date: 2012-09-06
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Publication No.: US08542446B2Publication Date: 2013-09-24
- Inventor: Takakazu Bito
- Applicant: Takakazu Bito
- Applicant Address: JP Kadoma-shi
- Assignee: Panasonic Corporation
- Current Assignee: Panasonic Corporation
- Current Assignee Address: JP Kadoma-shi
- Agency: Judge Patent Associates
- Priority: JP2011-012344 20110124
- Main IPC: G02B15/14
- IPC: G02B15/14 ; H04N5/262

Abstract:
A zoom lens system comprising: a positive first lens unit; a negative second lens unit; a positive third lens unit; a fourth lens unit; and an aperture diaphragm provided between the third lens unit and the fourth lens unit, wherein in zooming, the first to third lens units are moved along an optical axis to perform magnification change, the third lens unit includes two or more lens elements and one or more inter-lens-element air spaces, and the conditions: −7.0 9.0 (f1 and f2: composite focal lengths of the first and second lens units, fW and fT: focal lengths of the entire system at a wide-angle limit and a telephoto limit) are satisfied.
Public/Granted literature
- US20120327272A1 Zoom Lens System, Imaging Device and Camera Public/Granted day:2012-12-27
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