Optical recording apparatus with simultaneous erasing and record

Details Optical recording apparatus with simultaneous erasing and record Optical recording apparatus with simultaneous erasing and record

1989-10-20

1991-02-12

Psitos, Aristotelis M.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369100, 369112, 369 130, G11B 700

Patent

active

049930117

ABSTRACT:
An erasing beam B1 and a recording beam B2 emitted from a laser diode array 20 are focused on different tracks of a optical magnetic disk D, the erasing beam B1 being focused on a track located ahead of a track on which the recording beam B2 is focused. The reflected beams of the erasing beam B1 and the recording beam B2 are separated respectively into two polarized components by means of a polarized beam splitter 17 and the polarized components are received by photo sensor means 23 and 24. Based on outputs of the photo sensor means 23 and 24, an address signal, a focus error signal and a tracking error signal are obtained. At the time of reproduction, the laser diode array 20 emits a reproducing beam so that the photo sensor means provide a reproducing signal.

REFERENCES:
patent: 4283777 (1981-08-01), Cuny et al.
patent: 4298974 (1981-11-01), Tsunoda et al.
patent: 4301527 (1981-11-01), Tsunoda et al.
patent: 4423495 (1983-12-01), Musha et al.
patent: 4502471 (1985-05-01), Carlin
patent: 4502472 (1985-05-01), Reno
patent: 4517667 (1985-05-01), Sprague
patent: 4562568 (1985-12-01), Hazel et al.
patent: 4571712 (1986-02-01), Romano et al.
patent: 4621351 (1986-11-01), Baer et al.
patent: 4630249 (1986-12-01), Broat et al.
patent: 4639907 (1987-01-01), Aoki et al.
patent: 4672594 (1987-06-01), Kato et al.
patent: 4686661 (1987-08-01), Isaka
patent: 4729122 (1988-03-01), Itoh
patent: 4841514 (1989-06-01), Tsuboi et al.

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