Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1981-06-30
1984-06-12
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
369 44, G01J 120
Patent
active
044544154
ABSTRACT:
Apparatus for reading information stored in a track pattern on a radiation reflecting record comprises a source of radiation for supplying a reading beam a tracking mirror assembly controllable for directing the reading beam in a radial direction on the record, an objective lens for controlling focus, a data photodetector and at least a first paired photodetector array including separated sectors for providing tracking error correction signals, optical detenting means comprising at least a second source of radiation fixed in place relative to an undeflected position of the tracking mirror and a second paired photodetector array associated with the second source for detecting movement of the tracking mirror from its undeflected position and means coupled from the output of the second photodetector array to the tracking mirror assembly for providing error correction signals to maintain the detent conditions during slewing.
REFERENCES:
patent: 2065365 (1936-12-01), Doyle et al.
patent: 3970845 (1976-07-01), Hollis et al.
patent: 4005260 (1977-01-01), Janssen
patent: 4330880 (1982-05-01), Van Dijk
patent: 4358796 (1982-11-01), Ceshkovsky et al.
Laub Leonard
Nayak Ashok B.
Nelms David C.
Storage Technology Corporation
LandOfFree
Tracking mirror assembly and control system for an optical data does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Tracking mirror assembly and control system for an optical data , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tracking mirror assembly and control system for an optical data will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-123510