System for reproducing pulse time modulated waveforms stored alo

Details System for reproducing pulse time modulated waveforms stored alo System for reproducing pulse time modulated waveforms stored alo

1983-10-25

1985-01-01

Cardillo, Jr., Raymond F.

Boots, shoes, and leggings

369 44, 369109, 369111, 369275, G11B 712

Patent

active

044919409

ABSTRACT:
A record system for reproducing information recorded on a record. Information is recorded on a track of the record in the form of an embossed print made of diffractive elements representing the time variation of a pulse modulated waveform. The diffractive elements have a width on the order of the wavelength of a readout light beam. An optical beam readout device provides the concentrated read-out beam and senses a spatial variation in the diffractive energy emerging from an illuminated portion of the track.

REFERENCES:
patent: 3228015 (1966-01-01), Miyata
patent: 3287563 (1966-11-01), Clunis
patent: 3530258 (1970-09-01), Gregg
patent: 3534166 (1970-10-01), Korpel
patent: 3654401 (1972-04-01), Dickopp et al.
patent: 3687664 (1972-08-01), Broadbent
patent: 3798388 (1974-03-01), Dickopp
patent: 3833769 (1974-09-01), Compaan et al.
patent: 3838401 (1974-09-01), Graf et al.
patent: 3855426 (1974-12-01), Bouwhuis
patent: 4041530 (1977-08-01), Kramer et al.
IBM Technical Disclosure Bulletin, vol. 18, No. 11, 4/71, p. 356.

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