A quantitative test for the evaluation of surface figures of concave aspheric surfaces using a Babinet compensator is reported. A theoretical estimate of the sensitivity is 0.002λ for a minimum detectable phase change of 2 π × 10-3 rad over a segment length of 1.0 cm.
© 1979 Optical Society of America
A. K. Saxena, "Quantitative test for concave aspheric surfaces using a Babinet compensator," Appl. Opt. 18, 2897-2901 (1979)