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Optical Engineering • Open Access

Measuring the radius of curvature of a spherical mirror with an interferometer and a laser tracker

Paper Abstract

We present a method to accurately measure the radius of curvature of a concave spherical mirror with a phase-measuring interferometer and a laser tracker. Use of a laser tracker eases the alignment of the testing system, eliminates the need to move the test piece during the measurement, and improves the accuracy of the distance measurement. Using this method, we measured the radius of curvature of a spherical mirror 0.5 m in diameter and about 2.5 m in radius of curvature. The accuracy of the measurement is better than ±20 µm.

Paper Details

Date Published: 1 September 2005
PDF: 3 pages
Opt. Eng. 44(9) 090506 doi: 10.1117/1.2047594
Published in: Optical Engineering Volume 44, Issue 9
Show Author Affiliations
Chunyu Zhao, College of Optical Sciences/The Univ. of Arizona (United States)
René Zehnder, College of Optical Sciences/The Univ. of Arizona (United States)
James H. Burge, College of Optical Sciences/The Univ. of Arizona (United States)


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