This paper describes the Asfar-22 15-cm cryo-objective for extra-atmospheric IR astronomy in the 1-20-μm range of wavelengths. The large field of 5° and relative aperture of 1:1.8, which maximize the probability of detecting moving and extended objects, are achieved by using a three-mirror optical layout. The first sample of such a telescope layout is fabricated from a three-mirror optical layout. The first sample of such a telescope layout is fabricated from 1201 aluminum alloy. Its parameters, the method of the first stage of experiments under normal conditions, and their results are given.
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