Aspheric Measurement Using Phase-Shifting Interferometry

Katherine Creath; James C. Wyant

doi:10.1117/12.967295

1 January 1987 Aspheric Measurement Using Phase-Shifting Interferometry

Katherine Creath, James C. Wyant

Proceedings Volume 0813, Optics and the Information Age; (1987) https://doi.org/10.1117/12.967295
Event: 14th Congress of the International Commission for Optics, 1987, Quebec, Canada

Abstract

Aspheric optical surfaces are difficult to test because these surfaces generally depart too much from a sphere for a conventional interferometer to resolve the interference fringes and allow reconstruction of the test surface. A large number of detector points can provide a brute force approach to measuring these surfaces. More elegant techniques such as using multiple wavelengths or a priori information about the wavefront can enable wavefront reconstruction.^1-3 Once the necessary information has been detected, corrections are needed to account for the propagation of aberrations through the optical system from the test surface to the detector. Combining fringe analysis with lens design software will allow this correction to take place. This paper examines these techniques, and compares them to currently utilized techniques.

Citation Download Citation

Katherine Creath and James C. Wyant "Aspheric Measurement Using Phase-Shifting Interferometry", Proc. SPIE 0813, Optics and the Information Age, (1 January 1987); https://doi.org/10.1117/12.967295

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