Invention Grant
- Patent Title: Illumination apparatus having planar array of LEDs and movable pair of lens arrays for modifying light output
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Application No.: US16741418Application Date: 2020-01-13
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Publication No.: US11255514B2Publication Date: 2022-02-22
- Inventor: Noboru Osaka , Yoichi Oeda
- Applicant: CANON KABUSHIKI KAISHA
- Applicant Address: JP Tokyo
- Assignee: CANON KABUSHIKI KAISHA
- Current Assignee: CANON KABUSHIKI KAISHA
- Current Assignee Address: JP Tokyo
- Agency: Canon U.S.A., Inc., IP Division
- Priority: JPJP2019-015844 20190131
- Main IPC: F21V14/06
- IPC: F21V14/06 ; F21V9/40 ; G02B19/00 ; F21V5/04 ; F21Y115/10
Abstract:
An illumination apparatus includes a plurality of LED chips arranged to form an LED array, light from the plurality of LED chips superimpose to project a light intensity distribution projected on the predetermined plane; a pair of lens arrays each including a plurality of lenses and configured to collect light from the LED arrays; a driving unit configured to adjust a distance between the pair of lens arrays and change the light intensity distribution projected on the predetermined plane; and a control unit for individually controlling the output of the first and second LED arrays.
Public/Granted literature
- US20200248890A1 LIGHT SOURCE DEVICE, ILLUMINATION APPARATUS, EXPOSURE APPARATUS, AND METHOD FOR MANUFACTURING ARTICLE Public/Granted day:2020-08-06
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