Method for making high efficiency volume phase holograms

Details Method for making high efficiency volume phase holograms Method for making high efficiency volume phase holograms

G - Physics

03

H

G03H 1/04 (2006.01) G02B 5/32 (2006.01) G03F 7/00 (2006.01) G03H 1/02 (2006.01)

Patent

CA 2070343

TITLE METHOD FOR MAKING HIGH EFFICIENCY VOLUME PHASE HOLOGRAMS ABSTRACT OF THE DISCLOSURE A method for making volume phase Holographic Optical Elements derived from binary Intensity Computer Generated Holograms, Welch utilizes a photohardened refractive index-modulatory polymer sandwiched between two transparent, substantially identical, dimensionally stable substrates. The photohardened refractive index-modulatory polymer is imaged by intimately contacting the photosensitive polymer layer with a computer generated relief image photomask-master and passing actinic radiation through the photomask-master in order to change the refractive index of the exposed areas of the photopolymer to produce a volume phase Holographic Optical Element.

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