Detecting light spot movement direction for an optical disk

Details Detecting light spot movement direction for an optical disk Detecting light spot movement direction for an optical disk

1988-04-08

1989-10-03

Richardson, Robert L.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 46, G11B 700

Patent

active

048721530

ABSTRACT:
The peak value of upper envelope of an optical disk read signal is detected, and a signal indicative of the detected peak value or upper envelope is used to correct the total reflected light amount signal. That is to say, two output signals delivered from a pair of horizontally symmetrical photo detectors, which detect the reflected light of a light spot, added together, and furthermore a signal indicative of the result of this addition is added to the signal indicative of the peak value or upper envelope to produce a total reflected light amount signal which is not influenced by the pits on the optical disk.

REFERENCES:
patent: 4338682 (1982-07-01), Hosaka et al.
patent: 4506149 (1985-03-01), Utsumi
Japanese Patent Abstract 58-91536, (English Translation) May 31, 1983.

Affiliated with

Also associated with

Rating

Detecting light spot movement direction for an optical disk does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Detecting light spot movement direction for an optical disk, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Detecting light spot movement direction for an optical disk will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-668647