An Image Motion Compensation System for the Multi-Object Double Spectrograph

Jennifer L. Marshall; Bruce Atwood; Paul L. Byard; Darren L. DePoy; Thomas P. O'Brien; Richard W. Pogge

doi:10.1117/12.552015

30 September 2004 An Image Motion Compensation System for the Multi-Object Double Spectrograph

Jennifer L. Marshall, Bruce Atwood, Paul L. Byard, Darren L. DePoy, Thomas P. O'Brien, Richard W. Pogge

Proceedings Volume 5492, Ground-based Instrumentation for Astronomy; (2004) https://doi.org/10.1117/12.552015
Event: SPIE Astronomical Telescopes + Instrumentation, 2004, Glasgow, United Kingdom

Abstract

We describe progress on a closed-loop image motion compensation system (IMCS) for the Multi-Object Double Spectrograph (MODS). The IMCS actively compensates for image motion in the focal plane within the instrument caused by temperature fluctuation, mechanism flexure, and large scale structural bending due to gravity. The system utilizes an infrared laser as a reference beam that shares a light path with the science beam and is detected by an infrared reference detector adjacent to the science detector. The reference detector is read out frequently and detects any image motion in the focal plane. The IMCS compensates for this motion during a science exposure by adjusting the tip and tilt angles of the collimator mirror. A working lab prototype meets specifications and is described.

Citation Download Citation

Jennifer L. Marshall, Bruce Atwood, Paul L. Byard, Darren L. DePoy, Thomas P. O'Brien, and Richard W. Pogge "An Image Motion Compensation System for the Multi-Object Double Spectrograph", Proc. SPIE 5492, Ground-based Instrumentation for Astronomy, (30 September 2004); https://doi.org/10.1117/12.552015

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