Invention Grant
- Patent Title: Variable focal length lens apparatus and control method
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Application No.: US16556546Application Date: 2019-08-30
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Publication No.: US11215739B2Publication Date: 2022-01-04
- Inventor: Shiro Igasaki , Nobuo Ooba , Masaki Okayasu , Yuki Kurahashi
- Applicant: MITUTOYO CORPORATION
- Applicant Address: JP Kanagawa
- Assignee: MITUTOYO CORPORATION
- Current Assignee: MITUTOYO CORPORATION
- Current Assignee Address: JP Kanagawa
- Agency: Greenblum & Bernstein, P.L.C.
- Priority: JPJP2018-161172 20180830
- Main IPC: G02B3/14
- IPC: G02B3/14 ; G02B3/00 ; G02F1/11 ; G02F1/29
Abstract:
A variable focal length lens apparatus includes a liquid lens apparatus in which the refractive index changes in accordance with an input drive signal, and a refractive power controller that controls refractive power of the lens system. The refractive power controller adjusts the voltage of the drive signal in accordance with effective power that is supplied to the liquid lens apparatus.
Public/Granted literature
- US20200073025A1 VARIABLE FOCAL LENGTH LENS APPARATUS AND CONTROL METHOD Public/Granted day:2020-03-05
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