Abstract: A device for the optical abutment of photosensitive detectors using an optical system comprising two prisms joined together by a semireflecting face. The detectors are disposed on two right angle faces each belonging to a prism. The arrangement of the strips of detectors is such that they are as close as possible to each other and that the junction of two strips on one of the faces does not correspond to the junction of two strips on the other face. Means provide summation of the information from two detectors, situated on each of the two faces and receiving the same signal.

Abstract: A photodetector which uses a photoconductive layer for detection is provided with a load resistor which is a layer of the same material and shares the same substrate as the photoconducting layer for temperature compensation. The resistor layer is shielded from the radiation being detected while the photoconductive layer is exposed to the radiation. Advantageously, each layer has the same intrinsic resistance but the resistance layer is a scaled up transformation of the photoconducting layer.