Information readout apparatus and information readout method

Details Information readout apparatus and information readout method Information readout apparatus and information readout method

2005-01-18

2005-01-18

Hindi, Nabil (Department: 2655)

Dynamic information storage or retrieval

Binary pulse train information signal

Binary signal level detecting using a reference signal

C369S124150

Reexamination Certificate

active

06845074

ABSTRACT:
An information readout apparatus and an information readout method can efficiently correct the change in the size of the aperture. An optical disk1having a recording layer and a readout layer is used and the information recorded on the recording layer of the optical disk1is read out by irradiating a light beam onto the optical disk form head2and opening a detection window smaller than the area irradiated by the light beam in the readout layer. The resolution detecting section15of the apparatus detects the isolated mark recorded in the optical disk1in advance and then detects the resolution on the basis of the quotient obtained by dividing the difference X between the sample value Y near the peak of said isolated mark and the sample value adjacent to said sample value Y by said sample value Y near the peak, or X/Y. The readout control circuit14of the apparatus controls the size of the detection window so as to make the resolution detected by the resolution detecting section15close to the reference value K from the reference value output section13of the apparatus.

REFERENCES:
patent: 5483513 (1996-01-01), Fuji
patent: 5602810 (1997-02-01), Horimai et al.
patent: 5606545 (1997-02-01), Horimai et al.
patent: 5617400 (1997-04-01), Fuji
patent: 5633854 (1997-05-01), Horimai et al.
patent: 5684783 (1997-11-01), Horimai et al.
patent: 6278667 (1998-01-01), Belser
patent: 0 524 315 (1993-01-01), None
patent: 0 800 169 (1997-10-01), None
patent: WO 9953489 (1999-10-01), None
Patent Abstracts of Japan. vol. 1999, No. 13, Nov. 30, 1999, JP 11 224424, Aug. 17, 1999.

Affiliated with

Also associated with

Rating

Information readout apparatus and information readout method does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3423921