Record carrier on which information is stored in an optically re

Details Record carrier on which information is stored in an optically re Record carrier on which information is stored in an optically re

1976-03-03

1978-04-11

Cardillo, Jr., Raymond F.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

1791003G, 1791003V, 274 42R, 365124, H04N 576, G11B 2300

Patent

active

040841855

ABSTRACT:
A record carrier is described which is provided with an optically readable structure of trackwise arranged areas alternating with intermediate areas. Areas of at least two different types are provided. As a result, a high information density can be achieved. The different types of areas may also be used for centering a read beam relative to a track and for focussing the beam onto the track.

REFERENCES:
patent: 3314052 (1967-04-01), Lohmann
patent: 3348217 (1964-05-01), Snaper
patent: 3534166 (1970-10-01), Korpel
patent: 3627916 (1971-12-01), Bestenreiner
patent: 3688025 (1972-08-01), Whittemore
patent: 3746783 (1973-07-01), Gerritsen et al.
patent: 3753249 (1973-08-01), Silverman
patent: 3842197 (1974-10-01), Broussaud

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