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Focus retrocollimated interferometry for long-radius-of-curvature measurement

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Abstract

Focus retrocollimated interferometry is described for measuring long radius of curvature (⩾1 m), and achievable accuracy is discussed. It is shown that this method can be applied to both concave and convex spherical surfaces and can provide measurement to accuracy of 0.01–0.1%.

© 2001 Optical Society of America

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