Invention Grant
- Patent Title: Zoom optical system and image taking apparatus using the same
- Patent Title (中): 变焦光学系统和使用其的摄像装置
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Application No.: US12215934Application Date: 2008-06-30
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Publication No.: US07643222B2Publication Date: 2010-01-05
- Inventor: Fumikazu Kanetaka
- Applicant: Fumikazu Kanetaka
- Applicant Address: JP Tokyo
- Assignee: Olympus Imaging Corp.
- Current Assignee: Olympus Imaging Corp.
- Current Assignee Address: JP Tokyo
- Agency: Kenyon & Kenyon LLP
- Priority: JP2005-174882 20050615; JP2005-327514 20051111; JP2006-082886 20060324
- Main IPC: G02B15/14
- IPC: G02B15/14
Abstract:
A zoom optical system comprising, in order from an object side: a first lens unit having a negative refractive power; a second lens unit having a positive refractive power; and a third lens unit having a positive refractive power, a space between the lens units being changed to thereby perform zooming and focusing, wherein the first lens unit is constituted of a negative lens.
Public/Granted literature
- US20090073573A1 Zoom optical system and image taking apparatus using the same Public/Granted day:2009-03-19
Information query
