Testing large flats with computer generated holograms

  1. Get@NRC: Testing large flats with computer generated holograms (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1117/12.927064
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Proceedings titleProceedings of SPIE - The International Society for Optical Engineering
ConferenceModern Technologies in Space- and Ground-Based Telescopes and Instrumentation II, 1 July 2012 through 6 July 2012, Amsterdam
Article number84500Z
SubjectCGH; Collimated light; Computer generated holograms; Fabrication errors; Flat mirrors; Optical test; Spherical mirror; Test; Wavefront correction; Alignment; Computer generated holography; Holograms; Interferometers; Mirrors; Optical telescopes; Spheres; Telescopes; Optical testing
AbstractWe describe the optical test of a large flat based on a spherical mirror and a dedicated CGH. The spherical mirror, which can be accurately manufactured and tested in absolute way, allows to obtain a quasi collimated light beam, and the hologram performs the residual wavefront correction. Alignment tools for the spherical mirror and the hologram itself are encoded in the CGH. Sensitivity to fabrication errors and alignment has been evaluated. Tests to verify the effectiveness of our approach are now under execution. © 2012 SPIE.
Publication date
AffiliationNational Research Council Canada (NRC-CNRC); NRC Herzberg Institute of Astrophysics (HIA-IHA)
Peer reviewedYes
NPARC number21269472
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Record identifiera0e346bd-0610-4802-af3b-6b399940b0ec
Record created2013-12-12
Record modified2016-05-09
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