High density recording and reproduction system and method

Details High density recording and reproduction system and method High density recording and reproduction system and method

1989-03-30

1992-06-16

Richardson, Robert L.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

360 18, 360 55, G11B 500

Patent

active

051230062

ABSTRACT:
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 alpha-numeric 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.

REFERENCES:
patent: 4486792 (1984-12-01), Edakubo
patent: 4618901 (1986-10-01), Hatakeyama et al.

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