Optical Figure Inspection of Diamond-Turned Metal Mirrors

R. N. Shagam; R. E. Sladky; J. C. Wyant

doi:10.1117/12.7972055

1 August 1977 Optical Figure Inspection of Diamond-Turned Metal Mirrors

R. N. Shagam, R. E. Sladky, J. C. Wyant

Author Affiliations +

Optical Engineering, Vol. 16, Issue 4, 164375 (August 1977). https://doi.org/10.1117/12.7972055

Abstract

This paper demonstrates that the optical testing of diamond-turned surfaces is best accomplished by interferometry and not by tests which measure wavefront slope. Certain conditions regarding the interferometer configuration must be met in order to generate meaningful and accurate interferograms. A 40 cm diameter aperture modified Mach-Zehnder interferometer mounted directly on the diamond-turning lathe to facilitate rapid testing of figure between fabrication cuts is described. Results for a spherical surface tested in a Twyman-Green interferometer and an off-axis parabola tested in the Mach-Zehnder interferometer are illustrated.

Citation Download Citation

R. N. Shagam, R. E. Sladky, and J. C. Wyant "Optical Figure Inspection of Diamond-Turned Metal Mirrors," Optical Engineering 16(4), 164375 (1 August 1977). https://doi.org/10.1117/12.7972055

Published: 1 August 1977

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