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US 5,291,472 AGranted
Information recording and reproduction methods using oscillation medium or transducer
OwnerJerome H. Lemelsoninventor
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OwnerJerome H. Lemelsoninventor
Estimating the term…
High density recording systems and methods are disclosed which employ a radiation beam to form spot-like recordings in record members such as discs, tapes and cards. The angle, offset or cross-sectional shape of the recording beam can be varied so as to vary the angle, offset or shape of the corresponding recordings in the record member. The recorded information can be electro-optically or magnetically detected and discriminated from each other to provide high density recordings of alphanumeric characters or digital data. Enhanced detection scanning is effected by ultrasonically vibrating the laser or an optical element, such as a prism or mirror receiving the reading light beam, in a manner to cause it to scan back and forth laterally to the record track as a longitudinal scanning movement is effected parallel to the longitudinal axis or centerline of the track. The reflected light is detected, computer processed and analyzed to effect proper detection of the recordings to generate correct data therefrom.
A method for recording and reproducing information comprising:
A method for reproducing prerecorded information comprising:
A method for reproducing pre-recorded information comprising:
A method for reproducing pre-recorded information comprising:
Dependencies are inferred from the claim text.