Use of computer generated holograms for alignment of complex null correctors

Rene Zehnder, James H Burge, Chunyu Zhao

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

18 Citations (Scopus)

Abstract

Large diameter, non-axisymmetric aspheric mirrors can be measured interferometrically using null correctors that employ computer generated holograms (CGHs). The testing of off axis segments for the new class of giant telescopes pose requirements that beyond the state of the an for CGHs alone. The long radius of curvature and the magnitude of the aspheric departure require other lenses and mirrors to be used along with the CGH. The alignment of these systems is very sensitive and the absolute accuracy of the alignment is critical to the system performance. We have developed techniques that use diffracted light from patterns on the CGH to accurately define the alignment of multi-element null correctors. We will present results from the null test of the 1.7-m New Solar Telescope primary mirror. The optical shape of this mirrors is an off-axis paraboloid from an f/0.7 parent.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume6273 II
DOIs
StatePublished - 2006
EventOptomechanical Technologies for Astronomy - Orlando, FL, United States
Duration: May 24 2006May 31 2006

Other

OtherOptomechanical Technologies for Astronomy
CountryUnited States
CityOrlando, FL
Period5/24/065/31/06

Fingerprint

Holograms
alignment
mirrors
Telescopes
telescopes
Lenses
Mirrors
lenses
curvature
requirements
radii
Testing

Keywords

  • Computer generated hologram
  • Null testing
  • Optical alignment

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Zehnder, R., Burge, J. H., & Zhao, C. (2006). Use of computer generated holograms for alignment of complex null correctors. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 6273 II). [62732S] https://doi.org/10.1117/12.672139

Use of computer generated holograms for alignment of complex null correctors. / Zehnder, Rene; Burge, James H; Zhao, Chunyu.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6273 II 2006. 62732S.

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

Zehnder, R, Burge, JH & Zhao, C 2006, Use of computer generated holograms for alignment of complex null correctors. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 6273 II, 62732S, Optomechanical Technologies for Astronomy, Orlando, FL, United States, 5/24/06. https://doi.org/10.1117/12.672139
Zehnder R, Burge JH, Zhao C. Use of computer generated holograms for alignment of complex null correctors. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6273 II. 2006. 62732S https://doi.org/10.1117/12.672139
Zehnder, Rene ; Burge, James H ; Zhao, Chunyu. / Use of computer generated holograms for alignment of complex null correctors. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6273 II 2006.
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