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Publication of FR980727ApublicationCriticalpatent/FR980727A/en
G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
G11B7/0033—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with cards or other card-like flat carriers, e.g. flat sheets of optical film
FR980727D1943-02-151943-02-15
Bright tape device for reproducing variations of recorded light intonities
ExpiredFR980727A
(en)