Invention Grant
- Patent Title: Fresnel lens, Fresnel lens unit, and head-up display
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Application No.: US16068956Application Date: 2017-01-10
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Publication No.: US10670780B2Publication Date: 2020-06-02
- Inventor: Ken′ichi Kasazumi , Toshiya Mori , Kosuke Kubota , Masahito Ogata , Hiroaki Okayama , Satoshi Kuzuhara
- Applicant: Panasonic Intellectual Property Management Co., Ltd.
- Applicant Address: JP Osaka
- Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
- Current Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
- Current Assignee Address: JP Osaka
- Agency: Greenblum & Bernstein, P.L.C.
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@42dd14a1
- International Application: PCT/JP2017/000380 WO 20170110
- International Announcement: WO2017/126353 WO 20170727
- Main IPC: G02B27/14
- IPC: G02B27/14 ; G02B3/08 ; B60K35/00 ; G02B27/01 ; G01C21/36
Abstract:
The present invention provides a Fresnel lens that can reduce generation of concentric stray light. The Fresnel lens includes a sawtooth corrugated face that is formed by alternately disposing a first face inclined relative to optical axis A and a second face substantially parallel to optical axis A, and a light shielding mask is formed at a position corresponding to the second face.
Public/Granted literature
- US20190011611A1 FRESNEL LENS, FRESNEL LENS UNIT, AND HEAD-UP DISPLAY Public/Granted day:2019-01-10
Information query
