A method for detecting the magnification of a small-aperture telescope

Abstract

The present invention discloses a method for detecting the magnification of a small-aperture telescope, comprising the following steps: S1, installing a detection device in place according to detection requirements; S2, adjusting the detection device so that the interference fringes of the telescope's outgoing light after being reflected by a plane mirror and the interference fringes of the plane mirror's own reflected light are simultaneously displayed on a surface interferometer; S3, adjusting a large-aperture plane mirror to a small angle, so that the surface interferometer displays interference fringes in two regions and their angle values, which are respectively recorded as θ T and θ M ; S4, adjust the large-aperture plane mirror in the opposite direction to a small angle, and the interference fringes of two areas and their angle values ​​are displayed on the surface interferometer, which are recorded as θ T ， and θ M ， ; S5, calculate the angular magnification M of the telescope under test 角 , and then convert it into its magnification M; S6, replace the sub-telescope, repeat S1-S5, and obtain the magnification of the four telescopes. The present invention is mature in technology, easy to implement, has high measurement accuracy, and is easy to promote and apply.

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