FIELD: measurement technology.
SUBSTANCE: device has input infrared lens mounted in series with dichroic mirror, antistokes frequency converter made of set of active light guides and pumping radiation source. Front edge surface of the frequency converter is put into coincidence with image plane of input infrared lens. Active light guide set has dichroic coatings on front and rare edge surfaces. Pumping radiation source is mounted at rare edge surface or at front edge surface which has simultaneously to be input and output of antistokes frequency converter.
EFFECT: increased brightness of image.
4 cl, 2 dwg
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