Null test optics for the MMT and Magellan 6.5-m f/1.25 primary mirrors

J. H. Burge, D. S. Anderson, D. A. Ketelsen, S. C. West

Research output: Contribution to journalConference articlepeer-review

24 Scopus citations


The instruments used to interferometrically measure the optical surfaces of the 6.5-m f/1.25 primary mirrors for the MMT conversion and Magellan Telescopes must compensate over 800 μm surface departure from the best fitting sphere. The errors in the optical test must not contribute more than 0.04 arc seconds FWHM to the final image and the conic constant must be held to 0.01%. This paper presents the design, analysis, fabrication, and certification of the instruments used to measure these giant mirrors to such high accuracy.

Original languageEnglish (US)
Pages (from-to)658-669
Number of pages12
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - Jun 1 1994
Externally publishedYes
EventAdvanced Technology Optical Telescopes V 1994 - Kailua, Kona, United States
Duration: Mar 13 1994Mar 18 1994

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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