A cryogenic, 1-5 micron atmospheric dispersion corrector for astronomical adaptive optics

Roland J. Sarlot, Donald W Mccarthy

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

2 Citations (Scopus)

Abstract

A cryogenic mechanism has been built to correct for the blurring effects of atmospheric dispersion in adaptive-optics images from large aperture telescopes. Steward Observatory's 6.5 m telescope features a deformable Cassegrain secondary mirror compensating for atmospheric turbulence at wavelengths from 1-5 microns. At 1 micron, smearing caused by atmospheric dispersion equals the diffraction-limited image width (0.04 arcseconds FWHM). In order to correct for this effect and to maintain the low thermal background provided by the adaptive secondary, we have designed and built a cryogenic (77 K) atmospheric dispersion corrector. Operating over a spectral range of 1-5 microns, two pairs of counter-rotating calcium/lithium-fluoride prisms provide diffraction-limited imaging over a field of 1.7 arcminutes at a zenith angle up to 45 degrees.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsR.E. Fischer, R. Barry Johnson, W.J. Smith
Pages72-78
Number of pages7
Volume4441
DOIs
StatePublished - 2001
EventCurrent Developments in Lens Design and Optical Engineering II - San Diego, CA, United States
Duration: Jul 30 2001Jul 30 2001

Other

OtherCurrent Developments in Lens Design and Optical Engineering II
CountryUnited States
CitySan Diego, CA
Period7/30/017/30/01

Fingerprint

Adaptive optics
adaptive optics
Cryogenics
cryogenics
Telescopes
Diffraction
telescopes
calcium fluorides
lithium fluorides
Atmospheric turbulence
blurring
atmospheric turbulence
zenith
Observatories
Prisms
Full width at half maximum
diffraction
prisms
Calcium
observatories

Keywords

  • ARIES
  • Atmospheric dispersion
  • Cryogenic prisms
  • Infrared
  • MMT

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Sarlot, R. J., & Mccarthy, D. W. (2001). A cryogenic, 1-5 micron atmospheric dispersion corrector for astronomical adaptive optics. In R. E. Fischer, R. Barry Johnson, & W. J. Smith (Eds.), Proceedings of SPIE - The International Society for Optical Engineering (Vol. 4441, pp. 72-78) https://doi.org/10.1117/12.449571

A cryogenic, 1-5 micron atmospheric dispersion corrector for astronomical adaptive optics. / Sarlot, Roland J.; Mccarthy, Donald W.

Proceedings of SPIE - The International Society for Optical Engineering. ed. / R.E. Fischer; R. Barry Johnson; W.J. Smith. Vol. 4441 2001. p. 72-78.

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

Sarlot, RJ & Mccarthy, DW 2001, A cryogenic, 1-5 micron atmospheric dispersion corrector for astronomical adaptive optics. in RE Fischer, R Barry Johnson & WJ Smith (eds), Proceedings of SPIE - The International Society for Optical Engineering. vol. 4441, pp. 72-78, Current Developments in Lens Design and Optical Engineering II, San Diego, CA, United States, 7/30/01. https://doi.org/10.1117/12.449571
Sarlot RJ, Mccarthy DW. A cryogenic, 1-5 micron atmospheric dispersion corrector for astronomical adaptive optics. In Fischer RE, Barry Johnson R, Smith WJ, editors, Proceedings of SPIE - The International Society for Optical Engineering. Vol. 4441. 2001. p. 72-78 https://doi.org/10.1117/12.449571
Sarlot, Roland J. ; Mccarthy, Donald W. / A cryogenic, 1-5 micron atmospheric dispersion corrector for astronomical adaptive optics. Proceedings of SPIE - The International Society for Optical Engineering. editor / R.E. Fischer ; R. Barry Johnson ; W.J. Smith. Vol. 4441 2001. pp. 72-78
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