A simple optical system consisting of two small lenses can be designed to take the place of a large flat in testing paraboloidal mirrors. Other aspheric concave mirrors can also be tested in this manner. The procedure for computing such a null corrector and the accuracy required in its manufacture and use are discussed.
© 1963 Optical Society of America
Original Manuscript: May 8, 1962
Published: February 1, 1963
Abe Offner, "A Null Corrector for Paraboloidal Mirrors," Appl. Opt. 2, 153-155 (1963)