FIELD: measurement technology. SUBSTANCE: known horizon scanner has an input planoconvex lens and a matrix radiation detector optically conjugated and fixed in the housing. An aperture diaphragm is mounted on the flat output surface of the input planoconvex lens. Mikaelyan lens optically conjugated with the aperture diaphragm is inserted. The flat matrix radiation detector is fixed on the output surface of Mikaelyan lens. EFFECT: enhanced accuracy of measurements. 1 dwg
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