Invention Grant
- Patent Title: Imaging lens comprising seven lenses of +−+−−+− or +++−−+− refractive powers
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Application No.: US16660306Application Date: 2019-10-22
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Publication No.: US11262546B2Publication Date: 2022-03-01
- Inventor: Hisao Fukaya
- Applicant: TOKYO VISIONARY OPTICS CO., LTD.
- Applicant Address: JP Tokyo
- Assignee: TOKYO VISIONARY OPTICS CO., LTD.
- Current Assignee: TOKYO VISIONARY OPTICS CO., LTD.
- Current Assignee Address: JP Tokyo
- Agency: Hamre, Schumann, Mueller & Larson, P.C.
- Priority: JPJP2018-199085 20181023
- Main IPC: G02B13/00
- IPC: G02B13/00 ; G02B9/64

Abstract:
There is provided an imaging lens with excellent optical characteristics which satisfies demand of a wide field of view, a low profile and a low F-number. An imaging lens comprises, in order from an object side to an image side, a first lens with positive refractive power in a paraxial region, a second lens, a third lens having an image-side surface being convex in the paraxial region, a fourth lens, a fifth lens with negative refractive power in the paraxial region, a sixth lens with positive refractive power in the paraxial region, and a seventh lens with negative refractive power having an image-side surface that is concave in the paraxial region and is formed as an aspheric surface having at least one pole point in a position off the optical axis.
Public/Granted literature
- US20210033821A1 IMAGING LENS Public/Granted day:2021-02-04
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