Measurement of aspheric mirror segments using Fizeau interferometry with CGH correction

Research output: Chapter in Book/Report/Conference proceedingConference contribution

19 Citations (Scopus)

Abstract

Large aspheric primary mirrors are proposed that use hundreds segments that all must be aligned and phased to approximate the desired continuous mirror. We present a method of measuring these concave segments with a Fizeau interferometer where a spherical convex reference surface is held a few millimeters from the aspheric segment. The aspheric shape is accommodated by a small computer generated hologram (CGH). Different segments are measured by replacing the CGH. As a Fizeau test, nearly all of the optical elements and air spaces are common to both the measurement and reference wavefront, so the sensitivities are not tight. Also, since the reference surface of the test plate is common to all tests, this system achieves excellent control for the radius of curvature variation from one part to another. This paper describes the test system design and analysis for such a test, and presents data from a similar 1.4-m test performed at the University of Arizona.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume7739
DOIs
StatePublished - 2010
EventModern Technologies in Space- and Ground-Based Telescopes and Instrumentation - San Diego, CA, United States
Duration: Jun 27 2010Jul 2 2010

Other

OtherModern Technologies in Space- and Ground-Based Telescopes and Instrumentation
CountryUnited States
CitySan Diego, CA
Period6/27/107/2/10

Fingerprint

Hologram
Holograms
Interferometry
Mirror
interferometry
Mirrors
mirrors
Systems analysis
Wavefronts
Optical devices
Interferometers
Fizeau Interferometer
Radius of curvature
airspace
Test System
Systems Analysis
Wave Front
systems analysis
System Design
Air

Keywords

  • Astronomical optics
  • Computer generated holograms
  • Interferometer
  • Optical testing

ASJC Scopus subject areas

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

Cite this

Burge, J. H., Zhao, C., & Dubin, M. B. (2010). Measurement of aspheric mirror segments using Fizeau interferometry with CGH correction. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 7739). [773902] https://doi.org/10.1117/12.857816

Measurement of aspheric mirror segments using Fizeau interferometry with CGH correction. / Burge, James H; Zhao, Chunyu; Dubin, Matthew B.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7739 2010. 773902.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Burge, JH, Zhao, C & Dubin, MB 2010, Measurement of aspheric mirror segments using Fizeau interferometry with CGH correction. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 7739, 773902, Modern Technologies in Space- and Ground-Based Telescopes and Instrumentation, San Diego, CA, United States, 6/27/10. https://doi.org/10.1117/12.857816
Burge JH, Zhao C, Dubin MB. Measurement of aspheric mirror segments using Fizeau interferometry with CGH correction. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7739. 2010. 773902 https://doi.org/10.1117/12.857816
Burge, James H ; Zhao, Chunyu ; Dubin, Matthew B. / Measurement of aspheric mirror segments using Fizeau interferometry with CGH correction. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7739 2010.
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