Optical pickup, optical information recording carrier and record

Details Optical pickup, optical information recording carrier and record Optical pickup, optical information recording carrier and record

1992-07-29

1994-04-12

Dzierzynski, Paul M.

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369112, 428694, 3461351, G11B 700

Patent

active

053032241

ABSTRACT:
An optical pickup using a fiber type SHG, an optical information recording carrier and an information recording and reproducing apparatus. In the optical pickup, the primary ray which was removed in conventional arrangements is utilized thereby the same pickup can be used not only for an optical disk of a high density but also for an optical disk of a usual record density. To raise the recording density of the information recording carrier the laminated structure is utilized to record information. Two rays having different wavelengths are directed onto the record layer and onto the recordable layer of the optical disk, and the information recording and reproducing apparatus performs the reproducing of information as well as error detection and record/reproduction of information, so that a novel reproduction mode is realized.

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patent: 5171392 (1992-12-01), Iida et al.
patent: 5172369 (1992-12-01), Chikuma et al.

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