Infrared imaging using a tip-tilt secondary mirror

Laird M. Close; Donald W. McCarthy

doi:10.1117/12.152681

Infrared imaging using a tip-tilt secondary mirror

Laird M. Close, Donald W. McCarthy

Astronomy

Research output: Contribution to journal › Conference article › peer-review

2 Scopus citations

Abstract

We have recently developed the first adaptive system to utilize a tip-tilt Cassegrain secondary mirror. The system (called FASTTRAC) is also unique since it uses an infrared array to track the brightest speckle of the guide star. FASTTRAC can correct wavefront slope fluctuations at up to 100Hz closed loop and stabilize image motion to less than 0.1" rms in the focal plane. The system requires an infrared guide star of 8th mag at K (22μm). The resulting 54×54" images show improvements of up to -300% in resolution (FWHM) when tracking the brightest speckle of the infrared guide star.

Original language	English (US)
Pages (from-to)	353-363
Number of pages	11
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	1920
DOIs	https://doi.org/10.1117/12.152681
State	Published - Aug 25 1993
Event	Active and Adaptive Optical Components and Systems II 1993 - Albuquerque, United States Duration: Feb 1 1993 → Feb 4 1993

ASJC Scopus subject areas

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

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10.1117/12.152681

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title = "Infrared imaging using a tip-tilt secondary mirror",

abstract = "We have recently developed the first adaptive system to utilize a tip-tilt Cassegrain secondary mirror. The system (called FASTTRAC) is also unique since it uses an infrared array to track the brightest speckle of the guide star. FASTTRAC can correct wavefront slope fluctuations at up to 100Hz closed loop and stabilize image motion to less than 0.1{"} rms in the focal plane. The system requires an infrared guide star of 8th mag at K (22μm). The resulting 54×54{"} images show improvements of up to -300% in resolution (FWHM) when tracking the brightest speckle of the infrared guide star.",

author = "Close, {Laird M.} and McCarthy, {Donald W.}",

note = "Funding Information: mirror mount and Brian McLeod for help with the software development. This work would not lave been possible without Dr. Marica Rieke who generously allowed us to use the NICMOS3 camera. This work was supported by NSF grant AST 88-22465 and AST 92-03336 and NASA grant NAGW 2254. Laird M. Close is supported by a NSERC (Canada) fellowship. Publisher Copyright: {\textcopyright} 1993 SPIE. All rights reserved.; Active and Adaptive Optical Components and Systems II 1993 ; Conference date: 01-02-1993 Through 04-02-1993",

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AU - Close, Laird M.

AU - McCarthy, Donald W.

N1 - Funding Information: mirror mount and Brian McLeod for help with the software development. This work would not lave been possible without Dr. Marica Rieke who generously allowed us to use the NICMOS3 camera. This work was supported by NSF grant AST 88-22465 and AST 92-03336 and NASA grant NAGW 2254. Laird M. Close is supported by a NSERC (Canada) fellowship. Publisher Copyright: © 1993 SPIE. All rights reserved.

PY - 1993/8/25

Y1 - 1993/8/25

N2 - We have recently developed the first adaptive system to utilize a tip-tilt Cassegrain secondary mirror. The system (called FASTTRAC) is also unique since it uses an infrared array to track the brightest speckle of the guide star. FASTTRAC can correct wavefront slope fluctuations at up to 100Hz closed loop and stabilize image motion to less than 0.1" rms in the focal plane. The system requires an infrared guide star of 8th mag at K (22μm). The resulting 54×54" images show improvements of up to -300% in resolution (FWHM) when tracking the brightest speckle of the infrared guide star.

AB - We have recently developed the first adaptive system to utilize a tip-tilt Cassegrain secondary mirror. The system (called FASTTRAC) is also unique since it uses an infrared array to track the brightest speckle of the guide star. FASTTRAC can correct wavefront slope fluctuations at up to 100Hz closed loop and stabilize image motion to less than 0.1" rms in the focal plane. The system requires an infrared guide star of 8th mag at K (22μm). The resulting 54×54" images show improvements of up to -300% in resolution (FWHM) when tracking the brightest speckle of the infrared guide star.

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JO - Proceedings of SPIE - The International Society for Optical Engineering

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T2 - Active and Adaptive Optical Components and Systems II 1993

Y2 - 1 February 1993 through 4 February 1993

ER -

Infrared imaging using a tip-tilt secondary mirror

Abstract

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