Optical recording and reproducing apparatus and method

Details Optical recording and reproducing apparatus and method Optical recording and reproducing apparatus and method

1998-03-16

2000-07-04

Hindi, Nabil

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369109, 369 4423, G11B 700

Patent

active

06084843&

ABSTRACT:
The present invention provides a compact recording and reproducing apparatus capable of playing back DVD and CDs including CD-R. This apparatus comprises a means of focusing a light of a first or second wavelength onto a first or second recording media; a first means disposed off the optical axis of the focusing means to generate a light of the first wavelength; a second means disposed on the optical axis of the focusing means to generate a light of the second wavelength; a means of correcting a coma aberration in the light of the first wavelength and guiding the corrected light along the optical axis of the focusing means, and a means of detecting the light of the first or second wavelength reflected from the first or second recording media.

REFERENCES:
patent: 5446565 (1995-08-01), Komma et al.
patent: 5793734 (1998-08-01), Tsuchiya et al.
patent: 5870369 (1999-02-01), Chung et al.
patent: 5875167 (1999-02-01), Katayama
patent: 5912868 (1999-06-01), Hayashi et al.
patent: 5933401 (1999-08-01), Lee et al.
patent: 5978346 (1999-11-01), Mizuno et al.

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