Beam position detecting device for optical disc apparatus

Details Beam position detecting device for optical disc apparatus Beam position detecting device for optical disc apparatus

1981-09-11

1984-01-17

Hecker, Stuart N.

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

250202, G11B 700, G11B 2110

Patent

active

044266944

ABSTRACT:
A laser beam, while moving in a radial direction of a rotating optical disc, illuminates the surface of the rotating optical disc and a portion of the laser beam reflected on the surface of the optical disc is directed to a fixed photosensor. The photosensor includes a plurality of photoelectric elements arranged along the radial direction of the disc. The fixed photoelectric elements thus receive the portion of the reflected laser beam as the beam moves in the radial direction of the optical disc, and produce corresponding photoelectric signals. The photoelectric signals are read out in a time series and converted to sampling pulse signals. A sawtooth signal is generated and sampled by the sampling pulse signals. A difference detector detects the difference between a sampled signal component of the sawtooth signal and a reference voltage to determine the beam position based on the detected difference.

REFERENCES:
patent: 4144542 (1979-03-01), Preuss
patent: 4224480 (1980-09-01), Satoh et al.
patent: 4290122 (1981-09-01), Bates et al.
patent: 4321622 (1982-03-01), Jerome et al.
patent: 4363116 (1982-12-01), Kleuters et al.
Lean, "GaAs Laser Array and Fiber-Optic Detector Array for Disc Appliction", IBM Tech. Disc. Bul., vol. 23, No. 7A, Dec. 1980, pp. 2992, 2993.

Affiliated with

Also associated with

Rating

Beam position detecting device for optical disc apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Beam position detecting device for optical disc apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Beam position detecting device for optical disc apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-703376