Preparation of photosensitive material to withstand a lamination

Optical: systems and elements – Holographic system or element – Having particular recording medium

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359 13, 359900, 430 1, 430 2, 430270, 428412, 4284237, 428426, 156 99, 264345, G03H 104

Patent

active

051384698

ABSTRACT:
A method for processing exposed holograms to enhance their thermal stability and enable them to withstand a windshield lamination process is disclosed. The secondary processing procedure entails an optional step of applying a moisture barrier to the hologram, followed by heat stabilizing the hologram and storing it in a relatively low humidity environment. Specifically, the exposed holographic material is heated to a peak temperature of about 135.degree. C. and thereafter cooled to provide a thermally stabilized holographic material that maintains its holographic qualities over a relatively broad range of temperatures.

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