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Proceedings Paper

Development of a broadband achromatic Twyman-Green interferometer
Author(s): Lawrence J. Steimle; Yaujen Wang
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Paper Abstract

A modified Twyman-Green interferometer is in use that makes possible wavefront testing of optical filters at any wavelength from 200 to 1100 nanometers. The use of mirrors for collimation and pupil imaging makes the instrument achromatic, and therefore the focus is fixed over the entire bandwidth. The beamsplitter and compensator plates are made of fused silica, and the detector is a UV enhanced CCD tv camera. A tunable monochrometer with a broadband light source permits selection of any wavelength. Fringe distortion, even when the collimating mirror is spherical, is small enough to keep measurement errors within 0.1 wave peak to valley over the 2 by 2 inch aperture.

Paper Details

Date Published: 1 October 1993
PDF: 8 pages
Proc. SPIE 2019, Infrared Spaceborne Remote Sensing, (1 October 1993); doi: 10.1117/12.157841
Show Author Affiliations
Lawrence J. Steimle, L.J. Steimle Enterprises (United States)
Yaujen Wang, Hughes Aircraft Co. (United States)


Published in SPIE Proceedings Vol. 2019:
Infrared Spaceborne Remote Sensing
Marija S. Scholl, Editor(s)

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