Mi. Baganov et al., SMALL DEVIATIONS OF THE SURFACES OF OPTICAL-COMPONENTS FROM A SPHERICAL SHAPE, Soviet journal of optical technology, 60(5), 1993, pp. 333-336
Relationships are obtained from which it follows that, when optical su
rfaces are tested by means of a proof glass, it is difficult to detect
a small aspherization of the surfaces, which can exert an appreciable
effect on image quality. Recommendations are given for eliminating th
e uncertainty in evaluating the quality of finished surfaces.