Invention Grant
- Patent Title: Zoom lens
- Patent Title (中): 变焦镜头
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Application No.: US13544158Application Date: 2012-07-09
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Publication No.: US09229204B2Publication Date: 2016-01-05
- Inventor: Dayong Li
- Applicant: Dayong Li
- Applicant Address: JP Saitama-shi
- Assignee: TAMRON CO., LTD.
- Current Assignee: TAMRON CO., LTD.
- Current Assignee Address: JP Saitama-shi
- Agency: Foley & Lardner LLP
- Priority: JP2011-183026 20110824
- Main IPC: G02B15/177
- IPC: G02B15/177 ; G02B27/64

Abstract:
A zoom lens includes sequentially from an object side, a first lens section G11 having a negative refractive power and a second lens section G12 having a positive refractive power. The first lens section G11 includes sequentially from the object side, a negative lens L111, a negative lens L112, and a positive lens L113. Both surface of the negative lens L112 are aspheric. The second lens section G12 includes sequentially from the object side, a front group G12F having a positive refractive power and a rear group G12R having a positive refractive power. Both surfaces of a negative lens L126 included in the rear group G12R are aspheric. The zoom lens can maintain high imaging performance while achieving size reductions and wide angle views by satisfying given conditions.
Public/Granted literature
- US20130050827A1 ZOOM LENS Public/Granted day:2013-02-28
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