Video disc with phase structure

Details Video disc with phase structure Video disc with phase structure

1975-09-30

1977-08-09

Cardillo, Jr., Raymond F.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

1791003V, 274 41R, 274 42R, 340173LT, H04N 576, G11B 724, G11B 2300

Patent

active

040415309

ABSTRACT:
A carrier is provided with a spiral structure in which sound and/or image information is stored in the form of frequency modulated or phase modulated signals. The carrier structure is composed of coplanar regions of variable length separated by coplanar areas of variable length. Where the regions and areas are all in the same plane the regions and areas have different coefficients of reflection or transmission. Where the regions and areas are not coplanar they are spaced by a distance sufficient to produce in response to impinging radiation a one-half wave length difference in the radiation exiting the regions and areas.
Apparatus for imaging the radiation exiting the carrier structure is also disclosed.

REFERENCES:
patent: 3287563 (1966-11-01), Clunis
patent: 3427628 (1969-02-01), Clunis
patent: 3430966 (1969-03-01), Gregg
patent: 3534166 (1970-10-01), Korpel
patent: 3654401 (1972-04-01), Dickopp et al.
patent: 3688025 (1972-08-01), Whittemore
patent: 3931459 (1976-01-01), Korpel

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