Demonstration of accuracy and flexibility of using CGH test plates for measuring aspheric surfaces

James H. Burge; Michael J. Fehniger; Glen C. Cole

doi:10.1117/12.295141

1 November 1997 Demonstration of accuracy and flexibility of using CGH test plates for measuring aspheric surfaces

James H. Burge, Michael J. Fehniger, Glen C. Cole

Proceedings Volume 3134, Optical Manufacturing and Testing II; (1997) https://doi.org/10.1117/12.295141
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

A method of interferometrically measuring large convex aspheres using test plates with computer generated holograms was developed at the University of Arizona. We present the results from a set of experiments that demonstrate the accuracy, flexibility, and the simplicity of performing the holographic test. A low-cost stand-alone setup as built for implementing this test on a 38-cm convex hyperboloid. A direct comparison of the CGH measurement with results from a classical Hindle test shows excellent agreement. We also demonstrate the unique attribute of this test to measure bare glass surfaces and highly reflective surfaces without making any modifications to the test equipment.

Citation Download Citation

James H. Burge, Michael J. Fehniger, and Glen C. Cole "Demonstration of accuracy and flexibility of using CGH test plates for measuring aspheric surfaces", Proc. SPIE 3134, Optical Manufacturing and Testing II, (1 November 1997); https://doi.org/10.1117/12.295141

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