Invention Grant
- Patent Title: Optical system and optical apparatus
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Application No.: US15014626Application Date: 2016-02-03
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Publication No.: US09651722B2Publication Date: 2017-05-16
- Inventor: Satoshi Ito , Hironobu Koga
- Applicant: CANON KABUSHIKI KAISHA
- Applicant Address: JP Tokyo
- Assignee: CANON KABUSHIKI KAISHA
- Current Assignee: CANON KABUSHIKI KAISHA
- Current Assignee Address: JP Tokyo
- Agency: Carter, DeLuca, Farrell & Schmidt, LLP
- Priority: JP2015-021965 20150206
- Main IPC: G02B9/08
- IPC: G02B9/08 ; G02B5/22 ; G02B5/20 ; G03B11/00 ; G03B9/02 ; G03B17/14
Abstract:
An optical system includes a plurality of lenses, a diaphragm configured to adjust a light amount, and an optical element having a transmittance distribution. A transmittance of the optical element satisfies predetermined conditions. In addition, another predetermined condition is satisfied when the diaphragm is fully opened.
Public/Granted literature
- US20160231479A1 OPTICAL SYSTEM AND OPTICAL APPARATUS Public/Granted day:2016-08-11
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