Method for photographic replication of information on an optical

Details Method for photographic replication of information on an optical Method for photographic replication of information on an optical

1980-06-04

1981-12-08

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Post imaging processing

430 5, 430 8, 430 16, 430 21, 430229, 430231, 430246, 430396, 430414, 430416, 430495, 430945, 346 11, 346 76L, 3461351, 358 6, 3581285, 358130, 369 84, 369100, 369112, 369121, 369125, 369153, 369284, 369288, G03C 176, G03C 526, G03C 554, G01D 1514

Patent

active

043048480

ABSTRACT:
A method of replicating data from a master transmissive optical data storage medium whereby the resulting product displays areas of low reflectivity and high reflectivity. Actinic radiation is shone through transmissive areas onto a silver-halide emulsion photosensitive medium. The photosensitive medium is then chemically developed black. Next, the developed medium is fogged to create a latent image layer of silver precipitating nuclei. Finally, the fogged medium is placed in a monobath comprising a weak silver-halide reducing agent and a rapid-acting silver-halide solvent for partial chemical development and substantial physical development. The resulting product displays areas of low reflectivity, which correspond to the transmissive areas of the master, in a reflective field.

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Bartolini et al., "Review and Analysis of Optical Recording Media", Optical Engineering, vol. 15, No. 2, 3/1976, pp. 99-108.
Jerome et al., "Film-Based Videodisc System", Journal of the SMPTE, vol. 83, 7/1974, pp. 560-563.

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