Invention Grant
- Patent Title: Wide-angle lens, imaging apparatus, and method for manufacturing wide-angle lens
- Patent Title (中): 广角镜头,成像装置以及制造广角镜的方法
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Application No.: US12917753Application Date: 2010-11-02
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Publication No.: US08699143B2Publication Date: 2014-04-15
- Inventor: Haruo Sato
- Applicant: Haruo Sato
- Applicant Address: JP Tokyo
- Assignee: Nikon Corporation
- Current Assignee: Nikon Corporation
- Current Assignee Address: JP Tokyo
- Agency: Miles & Stockbridge P.C.
- Priority: JP2009-257359 20091110; JP2009-257367 20091110; JP2009-257385 20091110
- Main IPC: G02B15/14
- IPC: G02B15/14 ; G02B13/18

Abstract:
Including: a front lens group Gf disposed to an object side of an aperture stop; and a rear lens group Gr disposed to an image side of the aperture stop; the front lens group including a sub-lens group Ga having negative refractive power, the sub-lens group Ga including, in order from the most object side, at least three negative lenses, at least one of the three negative lens being an aspherical negative meniscus lens, the aspherical negative meniscus lens having a shape that negative refractive power is getting smaller from the center to the periphery, a cemented lens constructed by a positive lens, a negative lens, and a positive lens being disposed to the image side of the sub-lens group Ga, and given conditional expressions being satisfied, thereby providing a wide-angle lens having high optical performance with a wide angle of view.
Public/Granted literature
- US20110109974A1 WIDE-ANGLE LENS, IMAGING APPARATUS, AND METHOD FOR MANUFACTURING WIDE-ANGLE LENS Public/Granted day:2011-05-12
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