Focusing a NIR adaptive optics imager, experience with GSAOI

Matthew Doolan; Gabe Bloxham; Peter Conroy; Damien Jones; Peter McGregor; Dejan Stevanovic; Jan Van Harmelen; Liam E. Waldron; Mark Waterson; Ross Zhelem

doi:10.1117/12.670891

Focusing a NIR adaptive optics imager, experience with GSAOI

Matthew Doolan^*, Gabe Bloxham, Peter Conroy, Damien Jones, Peter McGregor, Dejan Stevanovic, Jan Van Harmelen, Liam E. Waldron, Mark Waterson, Ross Zhelem

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

The Gemini South Adaptive Optics Imager (GSAOI) to be used with the Multi-Conjugate Adaptive Optics (MCAO) system at Gemini South is currently in the final stages of assembly and testing. GSAOI uses a suite of 26 different filters, made from both BK7 and Fused Silica substrates. These filters, located in a non-collimated beam, work as active optical elements. The optical design was undertaken to ensure that both the filter substrates both focused longitudinally at the same point. During the testing of the instrument it was found that longitudinal focus was filter dependant. The methods used to investigate this are outlined in the paper. These investigations identified several possible causes for the focal shift including substrate material properties in cryogenic conditions and small amounts of residual filter power.

Original language	English
Title of host publication	Optomechanical Technologies for Astronomy
DOIs	https://doi.org/10.1117/12.670891
Publication status	Published - 2006
Event	Optomechanical Technologies for Astronomy - Orlando, FL, United States Duration: 24 May 2006 → 31 May 2006

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	6273 II
ISSN (Print)	0277-786X

Conference

Conference	Optomechanical Technologies for Astronomy
Country/Territory	United States
City	Orlando, FL
Period	24/05/06 → 31/05/06

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Doolan, M., Bloxham, G., Conroy, P., Jones, D., McGregor, P., Stevanovic, D., Van Harmelen, J., Waldron, L. E., Waterson, M., & Zhelem, R. (2006). Focusing a NIR adaptive optics imager, experience with GSAOI. In Optomechanical Technologies for Astronomy Article 62732D (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 6273 II). https://doi.org/10.1117/12.670891

@inproceedings{89abaca2a417401dbc9d91abf615001c,

title = "Focusing a NIR adaptive optics imager, experience with GSAOI",

abstract = "The Gemini South Adaptive Optics Imager (GSAOI) to be used with the Multi-Conjugate Adaptive Optics (MCAO) system at Gemini South is currently in the final stages of assembly and testing. GSAOI uses a suite of 26 different filters, made from both BK7 and Fused Silica substrates. These filters, located in a non-collimated beam, work as active optical elements. The optical design was undertaken to ensure that both the filter substrates both focused longitudinally at the same point. During the testing of the instrument it was found that longitudinal focus was filter dependant. The methods used to investigate this are outlined in the paper. These investigations identified several possible causes for the focal shift including substrate material properties in cryogenic conditions and small amounts of residual filter power.",

keywords = "Focus techniques, Gemini, Instrumentation, Near-infrared",

author = "Matthew Doolan and Gabe Bloxham and Peter Conroy and Damien Jones and Peter McGregor and Dejan Stevanovic and {Van Harmelen}, Jan and Waldron, {Liam E.} and Mark Waterson and Ross Zhelem",

year = "2006",

doi = "10.1117/12.670891",

language = "English",

isbn = "0819463388",

series = "Proceedings of SPIE - The International Society for Optical Engineering",

booktitle = "Optomechanical Technologies for Astronomy",

note = "Optomechanical Technologies for Astronomy ; Conference date: 24-05-2006 Through 31-05-2006",

}

Doolan, M, Bloxham, G, Conroy, P, Jones, D, McGregor, P, Stevanovic, D, Van Harmelen, J, Waldron, LE, Waterson, M & Zhelem, R 2006, Focusing a NIR adaptive optics imager, experience with GSAOI. in Optomechanical Technologies for Astronomy., 62732D, Proceedings of SPIE - The International Society for Optical Engineering, vol. 6273 II, Optomechanical Technologies for Astronomy, Orlando, FL, United States, 24/05/06. https://doi.org/10.1117/12.670891

TY - GEN

T1 - Focusing a NIR adaptive optics imager, experience with GSAOI

AU - Doolan, Matthew

AU - Bloxham, Gabe

AU - Conroy, Peter

AU - Jones, Damien

AU - McGregor, Peter

AU - Stevanovic, Dejan

AU - Van Harmelen, Jan

AU - Waldron, Liam E.

AU - Waterson, Mark

AU - Zhelem, Ross

PY - 2006

Y1 - 2006

N2 - The Gemini South Adaptive Optics Imager (GSAOI) to be used with the Multi-Conjugate Adaptive Optics (MCAO) system at Gemini South is currently in the final stages of assembly and testing. GSAOI uses a suite of 26 different filters, made from both BK7 and Fused Silica substrates. These filters, located in a non-collimated beam, work as active optical elements. The optical design was undertaken to ensure that both the filter substrates both focused longitudinally at the same point. During the testing of the instrument it was found that longitudinal focus was filter dependant. The methods used to investigate this are outlined in the paper. These investigations identified several possible causes for the focal shift including substrate material properties in cryogenic conditions and small amounts of residual filter power.

AB - The Gemini South Adaptive Optics Imager (GSAOI) to be used with the Multi-Conjugate Adaptive Optics (MCAO) system at Gemini South is currently in the final stages of assembly and testing. GSAOI uses a suite of 26 different filters, made from both BK7 and Fused Silica substrates. These filters, located in a non-collimated beam, work as active optical elements. The optical design was undertaken to ensure that both the filter substrates both focused longitudinally at the same point. During the testing of the instrument it was found that longitudinal focus was filter dependant. The methods used to investigate this are outlined in the paper. These investigations identified several possible causes for the focal shift including substrate material properties in cryogenic conditions and small amounts of residual filter power.

KW - Focus techniques

KW - Gemini

KW - Instrumentation

KW - Near-infrared

UR - http://www.scopus.com/inward/record.url?scp=33749614137&partnerID=8YFLogxK

U2 - 10.1117/12.670891

DO - 10.1117/12.670891

M3 - Conference contribution

SN - 0819463388

SN - 9780819463388

T3 - Proceedings of SPIE - The International Society for Optical Engineering

BT - Optomechanical Technologies for Astronomy

T2 - Optomechanical Technologies for Astronomy

Y2 - 24 May 2006 through 31 May 2006

ER -

Focusing a NIR adaptive optics imager, experience with GSAOI

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