Certification of a null corrector via a diamond turned asphere: Design and implementation

Jose M. Sasian, Scott A. Lerner, Jim Burge

Research output: Contribution to journalConference articlepeer-review

7 Scopus citations


One well-known problem of null correctors used to test astronomical optics is the potential error that they can introduce in the surface under test. This error results from the fabrication or assembly errors of the null corrector itself. One solution to this problem is to certify the null corrector using a computer generated hologram. The holograms are manufactured with a circular laser writing machine, and have demonstrated accuracy of 0.01 waves rms for mirrors as fast as f/1.1. The holograms are designed and manufactured independent from the null correctors, so when the null corrector and the hologram agree, they are assumed to be both correct.

Original languageEnglish (US)
Pages (from-to)284-285
Number of pages2
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 1999
EventProceedings of the 1999 18th Congress of the International Commission for Optics (ICO XVIII): Optics for the Next Millennium - San Francisco, CA, USA
Duration: Aug 2 1999Aug 6 1999

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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