A Method Determining the Curvature of Weak Surfaces

Kenneth C. Lawton

doi:10.1364/OFT.1981.WA8

Workshop on Optical Fabrication and Testing
Technical Digest Series (Optica Publishing Group, 1981),
paper WA8
•https://doi.org/10.1364/OFT.1981.WA8

A Method Determining the Curvature of Weak Surfaces

Kenneth C. Lawton

Optical Fabrication and Testing 1981

Anaheim, California United States
9–11 December 1981
ISBN:

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Session A: Optical Testing Technology (WA)

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K. C. Lawton, "A Method Determining the Curvature of Weak Surfaces," in Workshop on Optical Fabrication and Testing, Technical Digest Series (Optica Publishing Group, 1981), paper WA8.

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Abstract

Accuracy in determination of the curvature of surfaces with radii greater than 2.5 meters, or with numerical apertures smaller than .01 is difficult. Methods of fringe counting against a flat, sagitta measurement, or using improvised test benches yield results with low precision.

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