Scale-up process for replicating large area diffractive optical

Details Scale-up process for replicating large area diffractive optical Scale-up process for replicating large area diffractive optical

1994-12-30

1997-01-28

Bell, Janyce

Coating processes

Optical element produced

427269, 427271, 427358, 427369, 427371, 4273897, 427510, 4273855, 427240, B05D 506

Patent

active

055976131

ABSTRACT:
The present invention discloses 1) a process for photopolymer replication on plastics, and 2) the scale-up step-and-repeat process in photopolymers. High fidelity optical element replication using a master optical element having submicron diffractive pattern feature sizes embossed into a UV curable photopolymer material for step-and-repeat "tiling" replication of the master optical element to create light weight, low cost, large area diffractive optical elements (LADOE). Furthermore, by using a chrome mask to eliminate ridge formation around a single diffractive optic element extremely narrow seams result, thereby increasing the optical fidelity of the resulting LADOE. Accordingly, each LADOE made according to the present invention is characterized by having minimum seam widths between patterns of discrete diffractive optic elements that introduce negligible optical distortion to a viewer.

REFERENCES:
patent: 4933120 (1990-06-01), D'Amato et al.
patent: 5116548 (1992-05-01), Mallik et al.
patent: 5188863 (1993-02-01), de Graaf et al.
patent: 5300190 (1994-04-01), Sugimoto et al.
F. Shvartsman, Replication of Diffractive Optics, Critical Reviews on Diffractive and Miniaturized Optics, SPIE vol. CR49, 1993 (no mo.).

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