Efficient testing of off-axis aspheres with test plates and computer-generated holograms

J. H. Burge

Research output: Contribution to journalConference articlepeer-review

14 Scopus citations


Off axis aspheric surfaces, such as individual segments for a telescope mirror, and surfaces that do not have any optical axis are traditionally difficult to test. In addition to difficulties controlling the aspheric shape, mirror segments have tight on radius of curvature and optical axis position. This paper presents a new method of measuring these surfaces that uses a test plate with a spherical reference surface, in combination with a small computer generated hologram to compensate the aspheric departure. The example for measuring 1.8-m segments of a 10-m primary mirror is given.

Original languageEnglish (US)
Pages (from-to)348-357
Number of pages10
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 1999
EventProceedings of the 1999 'Optical Manufacturing and Testing III' - Denver, CO, USA
Duration: Jul 20 1999Jul 23 1999

ASJC Scopus subject areas

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


Dive into the research topics of 'Efficient testing of off-axis aspheres with test plates and computer-generated holograms'. Together they form a unique fingerprint.

Cite this