Telegraphy – Systems – Simplex-reversing periodic
Patent
1974-03-05
1976-03-16
Britton, Howard W.
Telegraphy
Systems
Simplex-reversing periodic
178DIG8, 250334, H01L 3118, H04N 718
Patent
active
039447308
ABSTRACT:
A device for the elimination of the effect of background radiation on the image representation in an IR-camera comprises scanning elements and a detector for the conversion of IR-radiation to a video signal and this video signal is supplied to an image representation unit via an a.c. voltage-coupled circuit, an image signal and a background signal appearing periodically and separate from each other in the camera.
REFERENCES:
patent: 3751586 (1973-08-01), Johansson
patent: 3798366 (1974-03-01), Hunt
Dahlqvist Jan
Johansson Benny
Matsson Bo
AGA Aktiebolag
Britton Howard W.
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