Abstract of the Disclosure Manually portable apparatus enabling high-resolution,two-dimensional infrared imaging of remote, non-contactingtargets is described. An on-axis optical subsystem consists ofa single, single-faceted planar scanning mirror that isreciprocable by stepper motors about two orthogonal axes. Oriented at approximately 45� relative to the mirror's line-of-sight axis to a target, the scanning mirror reflects infraredenergy incident thereon toward a spherical converging mirror,which may be manually focused to change the distance between itand a single-element, non-cryogenically cooled, heat-sensitivedetector located behind the scanning mirror. An ADC, amicroprocessor and a motor control circuit provide means forimaging the target by sampling the serial, conditioned output ofthe detector in timed relation to the angular positions of thestepper motors, and transforming energy density data totemperature data in a two-dimensional, pixel array. Integraldisplay means are provided, by which a colorable infrared imagemay be viewed. In a proposed modification, a parabolic, ratherthan spherical, converging mirror is used. In another proposedmodification, the detector interposes the scanning mirror andthe converging mirror, insubstantially occluding the infraredenegy reflected by the former.