Abstract

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

Afocal Correctors for Paraboloidal Mirrors

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Null test for a highly paraboloidal mirror

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