Aspheric Figure Generation Using Feedback From An Infrared Phase-Shifting Interferometer

H. Philip Stahl; Dean Ketelsen

doi:10.1117/12.950371

21 February 1986 Aspheric Figure Generation Using Feedback From An Infrared Phase-Shifting Interferometer

H. Philip Stahl, Dean Ketelsen

Proceedings Volume 0571, Large Optics Technology; (1986) https://doi.org/10.1117/12.950371
Event: 29th Annual Technical Symposium, 1985, San Diego, United States

Abstract

An infrared phase-shifting interferometric system has been integrated with a novel optical figure generator at the University of Arizona Optical Sciences Center. This unique generator facility can produce generalized axially symmetric surface figures in a timely and cost-effective manner. The success of this facility depends on both its ability to efficiently remove material while forming the surface figure, and its ability to monitor the surface figure during the generation process to provide feedback to the optician. The facility has been used on several occasions to custom generate off-axis parabolic segements. Figures to within 0.30 μm rms of the desired figure have been obtained. This paper discusses the usefulness of the infrared phase-shifting interferometric system for providing figure correcting feedback to the optician during the generation of the off-axis parabolic segments and how it is affected by the surface roughness produced by each generator tool.

Citation Download Citation

H. Philip Stahl and Dean Ketelsen "Aspheric Figure Generation Using Feedback From An Infrared Phase-Shifting Interferometer", Proc. SPIE 0571, Large Optics Technology, (21 February 1986); https://doi.org/10.1117/12.950371

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KEYWORDS

Interferometers

Diamond

Phase shifts

Surface roughness

Interferometry

Infrared radiation

Surface finishing

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