SCOTS: A reverse Hartmann test with high dynamic range for Giant Magellan Telescope primary mirror segments

Peng Su, Shanshan Wang, Manal Khreishi, Yuhao Wang, Tianquan Su, Ping Zhou, Robert E. Parks, Kevin Law, Mario Rascon, Tom Zobrist, Hubert Martin, James H Burge

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

38 Citations (Scopus)

Abstract

A software configurable optical test system (SCOTS) based on fringe reflection was implemented for measuring the primary mirror segments of the Giant Magellan Telescope (GMT). The system uses modulated fringe patterns on an LCD monitor as the source, and captures data with a CCD camera and calibrated imaging optics. The large dynamic range of SCOTS provides good measurement of regions with large slopes that cannot be captured reliably with interferometry. So the principal value of the SCOTS test for GMT is to provide accurate measurements that extend clear to the edge of the glass, even while the figure is in a rough state of figure, where the slopes are still high. Accurate calibration of the geometry and the mapping also enable the SCOTS test to achieve accuracy that is comparable measurement accuracy to the interferometric null test for the small- and middle- spatial scale errors in the GMT mirror.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume8450
DOIs
StatePublished - 2012
EventModern Technologies in Space- and Ground-Based Telescopes and Instrumentation II - Amsterdam, Netherlands
Duration: Jul 1 2012Jul 6 2012

Other

OtherModern Technologies in Space- and Ground-Based Telescopes and Instrumentation II
CountryNetherlands
CityAmsterdam
Period7/1/127/6/12

Fingerprint

High Dynamic Range
Test System
Telescopes
Optical System
dynamic range
Telescope
Reverse
Mirror
Mirrors
telescopes
mirrors
computer programs
Software
Slope
Figure
Principal value
CCD cameras
Liquid crystal displays
Interferometry
Optics

Keywords

  • Deflectometry
  • Fringe reflection
  • Hartmann test
  • Optical metrology
  • Optical testing

ASJC Scopus subject areas

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

Cite this

Su, P., Wang, S., Khreishi, M., Wang, Y., Su, T., Zhou, P., ... Burge, J. H. (2012). SCOTS: A reverse Hartmann test with high dynamic range for Giant Magellan Telescope primary mirror segments. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 8450). [84500W] https://doi.org/10.1117/12.926719

SCOTS : A reverse Hartmann test with high dynamic range for Giant Magellan Telescope primary mirror segments. / Su, Peng; Wang, Shanshan; Khreishi, Manal; Wang, Yuhao; Su, Tianquan; Zhou, Ping; Parks, Robert E.; Law, Kevin; Rascon, Mario; Zobrist, Tom; Martin, Hubert; Burge, James H.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8450 2012. 84500W.

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

Su, P, Wang, S, Khreishi, M, Wang, Y, Su, T, Zhou, P, Parks, RE, Law, K, Rascon, M, Zobrist, T, Martin, H & Burge, JH 2012, SCOTS: A reverse Hartmann test with high dynamic range for Giant Magellan Telescope primary mirror segments. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 8450, 84500W, Modern Technologies in Space- and Ground-Based Telescopes and Instrumentation II, Amsterdam, Netherlands, 7/1/12. https://doi.org/10.1117/12.926719
Su P, Wang S, Khreishi M, Wang Y, Su T, Zhou P et al. SCOTS: A reverse Hartmann test with high dynamic range for Giant Magellan Telescope primary mirror segments. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8450. 2012. 84500W https://doi.org/10.1117/12.926719
Su, Peng ; Wang, Shanshan ; Khreishi, Manal ; Wang, Yuhao ; Su, Tianquan ; Zhou, Ping ; Parks, Robert E. ; Law, Kevin ; Rascon, Mario ; Zobrist, Tom ; Martin, Hubert ; Burge, James H. / SCOTS : A reverse Hartmann test with high dynamic range for Giant Magellan Telescope primary mirror segments. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 8450 2012.
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