Invention Grant
US08169720B2 Rear focus wide-angle lens system and electronic imaging device using the same
有权
后焦距广角镜头系统和电子成像装置使用相同
- Patent Title: Rear focus wide-angle lens system and electronic imaging device using the same
- Patent Title (中): 后焦距广角镜头系统和电子成像装置使用相同
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Application No.: US12609236Application Date: 2009-10-30
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Publication No.: US08169720B2Publication Date: 2012-05-01
- Inventor: Masaru Eguchi
- Applicant: Masaru Eguchi
- Applicant Address: JP Tokyo
- Assignee: Hoya Corporation
- Current Assignee: Hoya Corporation
- Current Assignee Address: JP Tokyo
- Agency: Greenblum & Bernstein, P.L.C.
- Priority: JP2008-283355 20081104; JP2009-176553 20090729
- Main IPC: G02B9/04
- IPC: G02B9/04 ; G02B9/60
Abstract:
A rear focus wide-angle lens system includes a first lens group, a diaphragm, and a second lens group, in this order from the object. The second lens group is moved along the optical axis of the lens system when focusing is performed from infinity to an object at a closer distance. The rear focus wide-angle lens system satisfies the condition 1.5
Public/Granted literature
- US20100110561A1 REAR FOCUS WIDE-ANGLE LENS SYSTEM AND ELECTRONIC IMAGING DEVICE USING THE SAME Public/Granted day:2010-05-06
Information query
