Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1996-09-05
2000-02-22
Huber, Paul W.
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
369124, G11B 700
Patent
active
060288337
ABSTRACT:
An optical disk signal processing apparatus retains compatibility with the conventional continuous servo recording technique, and reduces the amount of noise included in a signal played back from the optical disk without the need to decrease the size of the area for recording data, resulting in a drastically increased signal-to-noise ratio. The optical disk signal processing apparatus has a light source, an optical system for leading a light beam generated by the light source, an optical device for converging the light beam output by the optical system and applying the converged beam to the rotating optical disk, a signal detecting optical system for detecting a signal reflected by the rotating disk through the optical device, and a light detecting instrument for converting light produced by the signal detecting optical system into an electrical signal and a data detecting circuit. The intensity of the beam radiated by the light source is modulated by a modulation circuit in synchronism with data detection timing so that a playback signal having an improved signal-to-noise ratio can be obtained by integrating a product of a response waveform signal generated by a light beam reflected from an information mark and a light-intensity modulating signal over a fixed period of time.
REFERENCES:
patent: 4480325 (1984-10-01), Aiki et al.
patent: 5126994 (1992-06-01), Ogawa et al.
patent: 5172352 (1992-12-01), Kobayashi
patent: 5216660 (1993-06-01), Iimura
patent: 5446716 (1995-08-01), Eastman et al.
patent: 5493549 (1996-02-01), Miyazawa
patent: 5559785 (1996-09-01), Honda et al.
patent: 5600612 (1997-02-01), Saito et al.
Maeda Takeshi
Sugiyama Hisataka
Hitachi , Ltd.
Huber Paul W.
LandOfFree
Optical disk signal processing apparatus using modulated light s 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 disk signal processing apparatus using modulated light s, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical disk signal processing apparatus using modulated light s will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-526164