Technique of forming a separate information bearing printed patt

Details Technique of forming a separate information bearing printed patt Technique of forming a separate information bearing printed patt

1991-04-16

1992-02-04

Arnold, Bruce Y.

Optical: systems and elements

Holographic system or element

Authentication

264 13, 283 86, 283904, 359572, G03H 102

Patent

active

050855140

ABSTRACT:
A method and system for replicating microstructure surface relief patterns, such as diffraction patterns including holograms, by casting. A liquid casting resin is held between a surface relief master of the microstructure to be replicated and a substrate while the resin is hardened by actinic radiation curing. Application of resin to edges and discontinuities of the master is avoided in order to reduce undesirable build-up of resin on these areas of the master. The hardened resin surface relief replica may optionally be coated with a discontinuous graphical pattern of a clear or colored paint that eliminates the effect of the surface relief pattern in the regions so coated.

REFERENCES:
patent: 4315665 (1982-02-01), Haines
patent: 4501439 (1985-02-01), Antes
patent: 4856857 (1989-08-01), Takeuchi et al.
patent: 4921319 (1990-05-01), Mallik
patent: 4933120 (1990-06-01), D'Amato et al.
patent: 4984824 (1991-01-01), Antes et al.

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