The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 25, 1997
Filed:
Aug. 31, 1994
Hughes Electronics, Los Angeles, CA (US);
Abstract
A process for making a multilayer photopolymer hologram structure without intervening adhesive layers between component photopolymer layers. The process includes the steps of exposing a first photopolymer recording layer to hologram forming light, exposing the holographically exposed first photopolymer recording layer to UV light to partially UV harden the first photopolymer recording layer, exposing a second photopolymer recording layer to hologram forming light, exposing the holographically exposed second photopolymer recording layer to UV light for a time interval that is sufficiently short to preserve the tackiness of the second photopolymer recording layer, laminating the second photopolymer recording layer onto the first photopolymer recording layer to form a laminar photopolymer structure having top and bottom photopolymer surfaces, baking the laminar photopolymer structure while subjecting the top and bottom surfaces thereof to the uniform pressure, and exposing the laminar photopolymer structure to UV light.