Invention Grant
- Patent Title: Lens array, lens unit, exposure device, LED head, and image forming apparatus
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Application No.: US16129256Application Date: 2018-09-12
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Publication No.: US10591842B2Publication Date: 2020-03-17
- Inventor: Akihiro Yamamura
- Applicant: Oki Data Corporation
- Applicant Address: JP Tokyo
- Assignee: Oki Data Corporation
- Current Assignee: Oki Data Corporation
- Current Assignee Address: JP Tokyo
- Agency: Rabin & Berdo, P.C.
- Priority: JP2017-185569 20170927
- Main IPC: G03G15/04
- IPC: G03G15/04 ; G02B9/04 ; G02B27/09 ; G02B3/02 ; G02B3/00

Abstract:
Provided are a lens array, a lens unit, an exposure device, an LED head, and an image forming apparatus. The lens array includes a plurality of lenses arranged so as to form an array. Each of the plurality of lenses is configured so that a contour focal length which is a focal length of a ray incident on a first position separate from an optical axis is longer than a paraxial focal length which is a focal length of a ray incident on a second position in the vicinity of the optical axis.
Public/Granted literature
- US20190094747A1 LENS ARRAY, LENS UNIT, EXPOSURE DEVICE, LED HEAD, AND IMAGE FORMING APPARATUS Public/Granted day:2019-03-28
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