Optical information processing apparatus

Details Optical information processing apparatus Optical information processing apparatus

1984-12-10

1987-01-06

McElheny, Jr., Donald

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369118, G11B 7125

Patent

active

046352430

ABSTRACT:
An optical information processing apparatus is provided with a unit for recording and reproducing information by projecting a main beam onto an information track on a recording medium, a unit for projecting at least two or more than two subsidiary light beams onto the information track to form light spots at different position in the transversal direction of the information track by the respective light beams and a unit for detecting the subsidiary beams reflected by the recording medium to derive a tracking signal for guiding the main beams correctly on the information track, and those light spots are larger in size in the longitudinal direction of the information track than in the transversal direction thereof.

REFERENCES:
patent: 4243850 (1981-01-01), Edwards
patent: 4449215 (1984-05-01), Reno
patent: 4561082 (1985-12-01), Gerard et al.

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