Data carrier optically read out by transmission, and method of m

Details Data carrier optically read out by transmission, and method of m Data carrier optically read out by transmission, and method of m

1975-05-13

1977-07-19

Konick, Bernard

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

1791003V, 1791003G, H04N 576

Patent

active

040372510

ABSTRACT:
The present invention relates to the protection of relief impressions formed in order to store information on a data carrier which can be optically read out by transmission. The invention relates to a data carrier the relief impression in which is protected by at least one layer transparent vis-a-vis the read-out radiation. The protective layer has an index of refraction that differs from that of the data carrier, per se. Thus, a refractive boundary at the relief impression is maintained and the information encoded in the diffractive relief pattern is preserved.

REFERENCES:
patent: 1951198 (1934-03-01), Mittell
patent: 1956626 (1934-05-01), Robbins
patent: 3430966 (1969-03-01), Gregg
patent: 3518442 (1970-06-01), Johnson
patent: 3729317 (1973-04-01), Stimson
patent: 3814904 (1974-06-01), Russell
patent: 3833408 (1974-09-01), Matthies
patent: 3843399 (1974-10-01), Kaplan
patent: 3848095 (1974-11-01), Wohlmut
patent: 3931460 (1976-01-01), Watson
"An Experimental Television Recording and Playback System Using Photographic Discs", by Rice et al.; Journal of the SMPTE; vol. 79, pp. 997-1002; Nov. 1970.
"Webster's New World Dictionary", c. 1970, p. 480.

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