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Proceedings Paper

A Coaxial Interferometer With Low Mapping Distortion
Author(s): Albert F. Slomba; John W. Figoski
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Paper Abstract

A vacuum rated Coaxial Reference Interferometer (CORI) has been designed that satisfies the data input requirements of Computer Controlled Polishing (CCP) methods. The instrument obtains wavefront data at very high sampling intervals (50 to 100 fringes per aperture) and maintains precise mirror to focal plane mapping fidelity. Realistic as manufactured design goals are a 0.010% rms wavefront quality at f/2.3 and the ability to locate positions on a 2.4 meter diameter mirror to within 0.6mm from interferogram coordinates. Internal calibration means have been provided to independently verify interferometer performance as required. The instrument can be used to test both uncoated and coated mirrors. Interferograms are recorded on 70-mm film but may be monitored visually or by means of a vidicon.

Paper Details

Date Published: 15 December 1978
PDF: 6 pages
Proc. SPIE 0153, Advances in Optical Metrology I, (15 December 1978); doi: 10.1117/12.938231
Show Author Affiliations
Albert F. Slomba, The Perkin-Elmer Corporation (United States)
John W. Figoski, The Perkin-Elmer Corporation (United States)


Published in SPIE Proceedings Vol. 0153:
Advances in Optical Metrology I
N. Balasubramanian; James C. Wyant, Editor(s)

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