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

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

Research output: Contribution to journalConference articlepeer-review

4 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)379-389
Number of pages11
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 1997
EventOptical Manufacturing and Testing II - San Diego, CA, United States
Duration: Jul 27 1997Jul 27 1997


  • Aspheres
  • Computer-generated holograms
  • Interferometry
  • Large optics
  • Optical testing

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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