Optical recording medium and device for reproducing the same

Details Optical recording medium and device for reproducing the same Optical recording medium and device for reproducing the same

1996-07-24

1998-06-02

Kiliman, Leszek

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428 646, 428694EC, 428694MM, 428694ML, 428694DE, 428694RL, 428694SC, 428900, 369 13, 3692751, 3692752, 3692754, 369788, G11B 566

Patent

active

057596573

ABSTRACT:
An optical recording medium includes: a substrate on which information is recorded as phase pits, and a polarization state varying layer for rotating a polarization state of a light beam irradiated thereon in accordance with a temperature distribution caused by irradiation of the light beam. A device for reproducing information recorded on the optical recording medium includes: light irradiation unit for irradiating a read-out light beam to produce a light spot on the optical recording medium so that a light intensity of the light beam at a first portion of the light spot is higher than a predetermined level, separation unit for separating a component of light beam having a predetermined polarization state from a light beam reflected by the optical recording medium, light receiving unit for receiving the light beam separated by said separation means and generating read-out signal, and reproducing unit for reproducing information recorded on the optical recording medium on the basis of the read-out signal.

REFERENCES:
patent: 4932012 (1990-06-01), Kobayashi
patent: 5168482 (1992-12-01), Aratani et al.
patent: 5208799 (1993-05-01), Nakao et al.
patent: 5241520 (1993-08-01), Ohta et al.
patent: 5283770 (1994-02-01), Nakao et al.
patent: 5335220 (1994-08-01), Ohta et al.
patent: 5402411 (1995-03-01), Maeda et al.
Aratani et al (R) "Unique MO Disk Attains Super Resolution"; JEE No. 293; May 1991; pp. 74-76.
Fukami et al (R) "Direct Overwrite Technology Using EC Multilayers" J. Magn. Soc. Jpn., vol. 15 (Supplement); Aug. 1991; pp. 293-298.
Ohta et al (R) "Read Out Mechanism of MSR"; J. Magn. Soc. Jpn., vol. 15 (Supplement)(Sep. 1991) pp. 319-322.
Fujii et al (R) "Direct Overwrite and SR Readout by E C Multilayer Film"; J. Magn. Soc. Jpn., vol. 17 (Supplement) Jan. 1993; pp. 167-170.

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