Invention Application
- 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.: US20180329127A1Publication Date: 2018-11-15
- Inventor: Thomas FÄCKE , Friedrich-Karl BRUDER , Günther WALZE , Andrey PUTILIN
- Applicant: Covestro Deutschland AG
- Priority: EP15195668.7 20151120
- International Application: PCT/EP2016/078166 WO 20161118
- Main IPC: G02B5/32
- IPC: G02B5/32 ; G03H1/02 ; G03H1/04

Abstract:
The invention relates to a method for recording a plurality of scatter volume holograms in a photopolymeric recording medium, the method comprising at least the following steps providing a first laser light source, providing a photopolymeric recording medium comprising 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, 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, wherein the irradiation of the photopolymeric recording medium is performed such that the light of the irradiating first laser light beam is scattered at scattering centers, the scattering centers being generated by the chemical react ion in the photoactive layer induced by the first laser light beam thus forming a plurality of scatter volume holo grams by interaction between the irradiating first laser light beam and the scattered light of the first laser light beam.
Public/Granted literature
- US10670789B2 Method for producing a beam shaping holographic optical element Public/Granted day:2020-06-02
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