FIELD: optical instrument engineering; space telescopes.
SUBSTANCE: device has radiation source that is disposed in focal plane of telescope, two penta-reflectors, radiation receiver and drive connected with telescope's mirror. Radiation receiver with wedge installed in front of the receiver is disposed in focal plane. Device is provided with unit for determining coordinates of radiation receiver of image of energy centers which unit is connected with receiver. Receiver is made in form of two parallel linear arrays of detectors. Distance between arrays is found from formula l=L tg[Θ(n-1)], where L is distance from wedge to receiver, Θ is refraction angle of material which the wedge is made of. Penta-reflectors are installed in main cross-section plane at angle of 90° to each other.
EFFECT: improved precision of determination of focusing.
1 dwg
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