Batshev

Promising methods for quality control test of large convex aspherical mirrors were considered in this article. These methods are based on a new scheme of illuminating the mirror under control by a parallel multiple-beam where the beams are perpendicular to the mirror’s symmetry axis. The main advantage of such methods is that they don't require auxiliary large-size optical elements. A new non-interferometric method for a quality control test of convex aspherical mirrors with high aperture (angle between the optical axis and the marginal normal to the mirror is more than 45 degrees) was developed on the basis of the specified illuminating scheme.

The main problem with manufacturing of large convex mirrors is in their optical testing that requires high-precision optical components with diameters exceeding the testing mirror. To avoid this problem there is a side illumination scheme, in which a narrow collimated beam propagates normal to the axis of the testing mirror. Wavefront reflected from the mirror contains information about its shape. Non-interferometric wavefront sensor is developed for analysis of the reflected beam. The method of definition of testing mirror profile is described.