Method of making laser disc memory storage article

Details Method of making laser disc memory storage article Method of making laser disc memory storage article

1979-09-14

1981-09-29

Hoffman, James R.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156285, 427164, 427166, C03C 1709, B32B 1508, G01D 1534

Patent

active

042921090

ABSTRACT:
A flexible laser disc for laser disc mass storage and retrieval of digital data, employs vacuum encapsulation of the laser storage medium in a saturated polyester plastic (PMMA), or other suitable, transparent plastic material, polymethylmethacrylate. The embedded laser storage medium is a low-melting thin film, in which the digital data are stored within laser-focus in the form of diffraction-limited "holes" (bits), created by means of signal-modulated strong laser radiation. The holes (bits) are time-sequentially arranged in the form of spiral or circular tracks of distinct separation. Data are instantaneously and secondarily retrieved with a laser, utilizing phase-lock and servo-controlled tracking with a mirror galvanometer.

REFERENCES:
patent: 3314073 (1967-04-01), Becker
patent: 3474457 (1969-10-01), Becker
patent: 3654624 (1972-04-01), Becker et al.
patent: 3665483 (1972-05-01), Becker et al.
patent: 4001840 (1971-01-01), Becker et al.
patent: 4038663 (1977-07-01), Day et al.

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