Modeling the transmission and thermal emission in a pupil image behind the Keck II adaptive optics system

Pauline Arriaga; Michael P. Fitzgerald; James E. Lyke; Randall D. Campbell; Peter L. Wizinowich; Sean M. Adkins; Keith Y. Matthews

doi:10.1117/12.2233068

9 August 2016 Modeling the transmission and thermal emission in a pupil image behind the Keck II adaptive optics system

Pauline Arriaga, Michael P. Fitzgerald, James E. Lyke, Randall D. Campbell, Peter L. Wizinowich, Sean M. Adkins, Keith Y. Matthews

Author Affiliations +

Proceedings Volume 9908, Ground-based and Airborne Instrumentation for Astronomy VI; 990835 (2016) https://doi.org/10.1117/12.2233068
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

Abstract

The design and performance of astronomical instruments depend critically on the total system throughput as well as the background emission from the sky and instrumental sources. In designing a pupil stop for background- limited imaging, one seeks to balance throughput and background rejection to optimize measurement signal-to-noise ratios. Many sources affect transmission and emission in infrared imaging behind the Keck Observatory’s adaptive optics systems, such as telescope segments, segment gaps, secondary support structure, and AO bench optics. Here we describe an experiment, using the pupil-viewing mode of NIRC2, to image the pupil plane as a function of wavelength. We are developing an empirical model of throughput and background emission as a function of position in the pupil plane. This model will be used in part to inform the optimal design of cold pupils in future instruments, such as the new imaging camera for OSIRIS.

Citation Download Citation

Pauline Arriaga, Michael P. Fitzgerald, James E. Lyke, Randall D. Campbell, Peter L. Wizinowich, Sean M. Adkins, and Keith Y. Matthews "Modeling the transmission and thermal emission in a pupil image behind the Keck II adaptive optics system", Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 990835 (9 August 2016); https://doi.org/10.1117/12.2233068

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