G.V. Simonov, K.N. Mikhnev, V.P. Makarenko

In this article we present a new method of focusing astronomical instruments with matrix receivers. The method relies on the analysis of a star image with the reciprocal movement of the focal plane array (FPA). Analyzing the location of the two local maxima of the star-s track, corresponding to the passage-s plane of the best focus, we can calculate the time between these maxima. If the position of the FPA is bound to the internal timer, the best-focus plane can be determined from the motion chart.