Optical information recording/reproducing apparatus and method c

Details Optical information recording/reproducing apparatus and method c Optical information recording/reproducing apparatus and method c

1996-08-28

1999-05-18

Dinh, Tan

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

369116, G11B11/00

Patent

active

059056959

ABSTRACT:
Recording of information is performed by selectively forming a high-temperature level state and a low-temperature level state on a recording medium which is capable of an optical modulation overwrite operation to multi-value power levels on the basis of a multi-pulse recording waveform. A power level PHth of the light beam immediately before the high-temperature level state begins to be formed on the medium is detected and a minimum power level PLmin of the light beam, which can form the low-temperature level state on the medium, is detected. Then, the multi-pulse recording waveform is switched on the basis of the detected power levels PHth and PLmin. Upon recording of a non-overwrite recording medium, a power level Pth of the light beam immediately before recording begins on the medium is detected and a maximum reproduction power level Prmax of the light beam at which information recorded on the medium is not erased is detected. Then, the multi-value recording waveform is switched on the basis of the detected power levels Pth and Prmax.

REFERENCES:
patent: 4939717 (1990-07-01), Ohno et al.
patent: 5084857 (1992-01-01), Miyauchi et al.
patent: 5091897 (1992-02-01), Otokawa et al.
patent: 5140580 (1992-08-01), Ohara et al.
patent: 5257256 (1993-10-01), Terao et al.
patent: 5305297 (1994-04-01), Nishiuchi et al.
patent: 5396480 (1995-03-01), Morishita et al.
patent: 5430696 (1995-07-01), Tokita et al.
patent: 5457666 (1995-10-01), Toda et al.
patent: 5481525 (1996-01-01), Saito et al.
patent: 5568464 (1996-10-01), Horie
patent: 5608710 (1997-03-01), Minemura et al.

Affiliated with

Also associated with

Rating

Optical information recording/reproducing apparatus and method c does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical information recording/reproducing apparatus and method c, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical information recording/reproducing apparatus and method c will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1765305