Invention Grant
- Patent Title: Imaging optical system
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Application No.: US16165272Application Date: 2018-10-19
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Publication No.: US10698183B2Publication Date: 2020-06-30
- Inventor: Eijiroh Tada , Yutaka Takakubo
- Applicant: HOYA CORPORATION
- Applicant Address: JP Tokyo
- Assignee: HOYA CORPORATION
- Current Assignee: HOYA CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Greenblum & Bernstein, P.L.C.
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@66ac18f6
- Main IPC: G02B9/60
- IPC: G02B9/60 ; G02B13/00 ; G02B9/64 ; G02B9/62 ; G02B13/04 ; G02B5/00

Abstract:
The object-side surface of a negative lens element closest to the object side within a first lens group includes a paraxial convex surface and a peripheral surface having a curvature less than that of the paraxial surface. The image-side surface of a last lens element of a second lens group includes a paraxial concave surface and a peripheral surface having an inflection point changing from positive to negative values. 0.10
Public/Granted literature
- US20190121095A1 IMAGING OPTICAL SYSTEM Public/Granted day:2019-04-25
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