Testing lenses and reflecting concave surfaces using a knife-edge interferometer

摘要

In a previous paper by Cebrian et aL [Opt. Eng. 53, 092006 (2014)], the knife-edge interferometer (KEI) was used for testing lenses with a collimated beam illuminating the lens. In this paper, a 2f scheme is used to test lenses, eliminating the use of a collimation beam, and testing, for the first time, concave reflecting (spherical and parabolic) surfaces at the center of curvature with KEI. (C) 2019 Optical Society of America