Invention Grant
- Patent Title: Method for producing a beam shaping holographic optical element
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Application No.: US15775649Application Date: 2016-11-18
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Publication No.: US10670789B2Publication Date: 2020-06-02
- Inventor: Thomas Fäcke , Friedrich-Karl Bruder , Günther Walze , Andrey Putilin
- Applicant: Covestro Deutschland AG
- Applicant Address: DE Leverkusen
- Assignee: Covestro Deutschland AG
- Current Assignee: Covestro Deutschland AG
- Current Assignee Address: DE Leverkusen
- Agency: Faegre Drinker Biddle & Reath LLP
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@128fd500
- International Application: PCT/EP2016/078166 WO 20161118
- International Announcement: WO2017/085274 WO 20170526
- Main IPC: G02B5/32
- IPC: G02B5/32 ; G03H1/04 ; G03H1/02 ; G03H1/28 ; G03H1/22

Abstract:
A method for recording a plurality of scatter volume holograms in a photopolymeric recording medium, the method including at least the following steps providing a first laser light source, providing a photopolymeric recording medium including a substrate and a photoactive layer, wherein the photopolymeric recording medium has an index modulation Δn of at least 0.04 and a thickness d of the photoactive layer of at least 25 μm, and irradiating the photopolymeric recording medium with the first laser light beam generated by the first laser light source with a minimum irradiation energy dosage of 3*Di, Di being the inhibition dosage of the photoactive layer.
Public/Granted literature
- US20180329127A1 METHOD FOR PRODUCING A BEAM SHAPING HOLOGRAPHIC OPTICAL ELEMENT Public/Granted day:2018-11-15
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