Record disk and method for producing the same with constant widt

Details Record disk and method for producing the same with constant widt Record disk and method for producing the same with constant widt

1976-07-30

1979-05-01

Konick, Bernard

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

1791003V, 1791004C, 346 76L, H04N 576, G11B 700

Patent

active

041527267

ABSTRACT:
In a record disk having a spiral groove in a surface thereof with the depth of the groove varying along the latter for representing recorded information, such as video signals; the groove has an inverted bell-shaped cross-section which is symmetrical about the median of the groove with each of the opposite side surfaces of the groove, at any location therealong, being defined approximately by the equation

REFERENCES:
patent: 3558208 (1971-01-01), Hudson
patent: 3737589 (1973-06-01), Redlich
patent: 3800099 (1974-03-01), Dickopp
patent: 3894179 (1975-07-01), Jacobs
patent: 3952146 (1976-04-01), Plows
patent: 4027330 (1977-05-01), Maslowski
Communication Systems, by A. B. Carlson, .COPYRGT.1968 by McGraw-Hill, Inc., pp. 136-138.

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