Read-only optical data card

Details Read-only optical data card Read-only optical data card

1988-06-22

1989-09-05

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Imaged product

Multilayer

430 10, 430 11, 430 12, 430 13, 430 15, 430945, 430964, 430 17, 430394, 430401, 430524, 430525, 3461351, 346 76L, 235487, 369 84, 369 85, 369 86, 428913, G03C 100, G03C 102, G11B 700, G11B 1103

Patent

active

048638196

ABSTRACT:
A data card comprising a self-supporting, wallet size plastic card base upon which is disposed a film substrate layer, a highly reflective layer and an optical storage layer which is a selected photosensitive layer which has been exposed at an actinic wavelength and developed to be substantially opaque over a portion of its extent, except for an imagewise exposure pattern of clear and partially clear data marks revealing to varying extends reflectivity in the underlying reflective layer. Data spots may have one of four different reflectivities thereby representing a quadrinary digit 0, 1, 2 or 3 replacing two binary digits. The reflective layer is matched to the selected optical storage layer so that the reflective layer is highly reflective at a read beam wavelength in the red or near infrared and less reflective at actinic wavelengths either in the blue/green range or in the ultraviolet. A double-sided data card with a transparent card base and two film substrate layers, two reflective layers and two optical storage layers is also disclosed. A method for forming the data cards comprises vacuum or vapor deposition of the reflective layer over the substrate layer, disposing the photosensitive layer over the reflective layer, making an imagewise exposure of the emulsion at actinic wavelengths through a multilevel opacity mask, developing the photosensitive layer opaque and disposing the resulting strip onto the card base. The photosensitive layers may be silver-halide, diazo or vesicular film emulsions.

REFERENCES:
patent: 3479754 (1986-04-01), Maurer
patent: 3701663 (1972-10-01), Kondo et al.
patent: 4150398 (1979-04-01), Kojima et al.
patent: 4239338 (1980-12-01), Borrelli et al.
patent: 4270130 (1981-05-01), Houle et al.
patent: 4278756 (1981-07-01), Bouldin et al.
patent: 4304848 (1981-12-01), Bouldin et al.
patent: 4359750 (1982-11-01), Howe
patent: 4374911 (1983-02-01), Hartley
patent: 4387381 (1983-06-01), Bell
patent: 4394661 (1983-07-01), Peeters
patent: 4414273 (1983-11-01), Wada et al.
patent: 4493887 (1985-01-01), Peeters et al.
patent: 4503135 (1985-03-01), Drexler
patent: 4542288 (1985-09-01), Drexler
patent: 4572891 (1986-02-01), Drexler
patent: 4578788 (1986-03-01), Ahn et al.
patent: 4588665 (1986-05-01), Drexler
patent: 4603099 (1986-07-01), Drexler
patent: 4634850 (1987-01-01), Pierce et al.
patent: 4642803 (1987-02-01), Drexler
patent: 4665004 (1987-05-01), Drexler
patent: 4673626 (1987-06-01), Takeda et al.
patent: 4680458 (1987-07-01), Drexler
Nelson, Carle, Microfilm Technology, pp. 185-210, 1965.
Xidex Micrographics, Vesicular and Diazo Film, no date; 4 pages.
Xidex Corp., "Vesicular Duplication", Innovator, 4/1984, 4 pages.
Xidex Corp., "Diazo Duplication", Innovator, 1/1984, 4 pages.
Howe, D. G. et al., Photo. Sci & Eng., vol. 23, No. 6, 11-12/1979, pp. 370-374.
Sporer, A. H., J. of Applied Photo. Eng., vol. 8, No. 5, pp. 200-203, 10/1982.

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