Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1989-03-21
1990-10-30
Fields, Carolyn E.
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
250332, 250349, G01J 506
Patent
active
049670824
ABSTRACT:
Thermal radiation detection apparatus is provided comprising an array of pyroelectric detectors 1,2,3,4 in which compensation is provided for the effect of ambient temperature changes on the detector outputs and also for d.c. offsets which occur in source follower impedance converters 13 necessarily used with each detector. Single element detectors are used, the end pair of elements 3,4 being shielded from radiation and used as reference elements. Each element has a pair of diodes 11,12 connected in parallel in opposite sense to provide a d.c. path across the element. The reference element outputs are averaged 16,17,18 and fed via a high gain negative feedback loop 19 to the common connection 10 of all the elements. Offset voltages and element signals generated by ambient temperature changes are thereby compensated to the extent that the reference offsets and thermal voltages equal those of the active detector elements.
REFERENCES:
patent: 4198564 (1980-04-01), Baker et al.
patent: 4792682 (1988-12-01), Endou et al.
Proceedings of SPIE, vol. 807, pp. 92-97; 1987, "High Resolution 64-Element Pyroelectric Linear Array IR Detector", Turnbull et al.
Cooke Martin E.
Turnbull Andrew A.
Botjer William L.
Fields Carolyn E.
U.S. Philips Corp.
LandOfFree
Temperature compensated thermal radiation detectors does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Temperature compensated thermal radiation detectors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Temperature compensated thermal radiation detectors will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-276588