A fast F-number 10.6-micron interferometer arm for transmitted wavefront measurement of optical domes

Doug S. Peterson; Tom E. Fenton; Teddi A. von Der Ahe

doi:10.1117/12.604121

18 May 2005 A fast F-number 10.6-micron interferometer arm for transmitted wavefront measurement of optical domes

Doug S. Peterson, Tom E. Fenton, Teddi A. von Der Ahe

Proceedings Volume 5786, Window and Dome Technologies and Materials IX; (2005) https://doi.org/10.1117/12.604121
Event: Defense and Security, 2005, Orlando, Florida, United States

Abstract

An optical train is designed and built to take a Ø1 inch collimated output sample beam from a 10.6 μm wavelength Wyko IR3 interferometer, and by use of a fast aperture-ratio lens, allow the diverging rays to pass through a steeply curved optical test dome, encounter a concave mirror and return to the interferometer for wavefront analysis. The advantage over off-the-shelf hardware is an ability to capture at one instant a large area or even the entire clear aperture, of a dome. The key to the design is the fast, f/0.65, highly-aspheric, diamond-turned, ZnSe lens, and the equally fast, very thick, deeply concave mirror. Other components allow for placement and rotation of the optical dome under test. Operation at 10.6 μm allows loose fabrication tolerances for the surfaces in the visible wavelengths, yet the system is of reference quality in the infrared. The subsystem is modular so that it may be easily removed to gain access to the standard output port of the interferometer for other purposes.

Citation Download Citation

Doug S. Peterson, Tom E. Fenton, and Teddi A. von Der Ahe "A fast F-number 10.6-micron interferometer arm for transmitted wavefront measurement of optical domes", Proc. SPIE 5786, Window and Dome Technologies and Materials IX, (18 May 2005); https://doi.org/10.1117/12.604121

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KEYWORDS

Interferometers

Domes

Mirrors

Wavefronts

Optical testing

Aspheric lenses

Fringe analysis

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