Process for recording low-frequency wide-band signals on a therm

Details Process for recording low-frequency wide-band signals on a therm Process for recording low-frequency wide-band signals on a therm

1976-03-17

1977-03-29

Cook, Daryl W.

Communications: electrical

Digital comparator systems

1791003G, 358129, G11C 1146, H04N 582, G11B 724

Patent

active

040152480

ABSTRACT:
A process for recording low-frequency, wide-band signals on a thermoplastic storage medium to obtain an improved signal-to-noise ratio characterized by exposing the thermoplastic storage medium with the information to be recorded and either simultaneously or in a sequential relation imposing a lattice signal onto the storage medium. In one embodiment of the process, the lattice signal is obtained by utilizing an optical grating which modulates light passing therethrough with the lattice signal. If the lattice signal is to be imposed simultaneously with the exposing of the information, the light containing the information is passed through the optical grating to have the lattice signal imposed thereon. In another embodiment, the lattice signal is imposed on the storage medium electronically by utilizing spaced electrode pairs which are energized either simultaneously with the exposing of the thermoplastic or in a sequential relation therewith.

REFERENCES:
patent: 3055006 (1962-09-01), Dreyfoos
patent: 3137762 (1964-06-01), Baumgartner
patent: 3158430 (1964-11-01), McNaney
patent: 3281798 (1966-10-01), Glenn
patent: 3312955 (1967-04-01), Lamberts
patent: 3732363 (1973-05-01), Glenn
H. Kiemle and Dieter Ross, "Ein Fuhring In Die Tecknik Der Holographie", Paragraph 6.61, p. 217, Akademsche Verlagsgesellschaft, Frankfurt, 1969.

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