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

6 July 2006 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

Author Affiliations +

Proceedings Volume 6273, Optomechanical Technologies for Astronomy; 62732D (2006) https://doi.org/10.1117/12.670891
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

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.

Citation Download Citation

Matthew Doolan, Gabe Bloxham, Peter Conroy, Damien Jones, Peter McGregor, Dejan Stevanovic, Jan Van Harmelen, Liam E. Waldron, Mark Waterson, and Ross Zhelem "Focusing a NIR adaptive optics imager; experience with GSAOI", Proc. SPIE 6273, Optomechanical Technologies for Astronomy, 62732D (6 July 2006); https://doi.org/10.1117/12.670891

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available