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Optical Engineering

Compact system for measurement of optical surfaces having a large radius of curvature
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Paper Abstract

A new method for measuring the radius of curvature (ROC) of an optical surface having a large radius is proposed. The method combines a Fizeau interferometer and a specially designed zoom lens to form a compact and convenient test setup, so that measurement of the curvatures for both concave and convex surfaces having a large ROC can be done in a simple and quick way. The design of the zoom lenses for this application, principle of the measurement, and calibration of the zoom lenses are discussed. By means of the proposed method, radii of 1.5 m to infinity, concave or convex surfaces, can be measured in compact setups efficiently. The accuracy of the measurements can reach up to 0.04% for a surface having a radius of 10 m.

Paper Details

Date Published: 1 July 2006
PDF: 6 pages
Opt. Eng. 45(7) 073603 doi: 10.1117/1.2219101
Published in: Optical Engineering Volume 45, Issue 7
Show Author Affiliations
Xianyang K. Cai, National Research Council Canada (Canada)
Shoude Chang, National Research Council Canada (Canada)
Costel Flueraru, National Research Council Canada (Canada)

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