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Proceedings Paper

Optical design of the slit-viewing camera for the NIRSPEC upgrade
Author(s): Emily C. Martin; Michael P. Fitzgerald; Ian S. McLean; Evan Kress; Eric Wang
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Paper Abstract

NIRSPEC is a 1-5 μm high- and medium-resolution echelle spectrograph for the Keck II telescope, delivered in 1999 by the UCLA Infrared Laboratory (PI: Ian McLean). The instrument will be upgraded to replace detectors and electronics in the spectrograph (SPEC) and slit-viewing camera (SCAM). The existing SCAM design is limited to the 1-2.5 μm regime and optimized for the PICNIC 256x256 40-μm-pixel array. The upgrade of the SCAM to a Teledyne H1RG 1024x1024 18-μm-pixel array will allow imaging of the slit from 1-5 μm, increasing observing efficiency in the L and M bands. The extension of SCAM’s wavelength coverage requires re-optimization of its optical design. We present a proof-of-concept optical design of the new SCAM, optimized for a replacement detector. We discuss lens choices, design constraints, and the addition of blocking filters to mitigate saturation issues related to the high background levels in the thermal infrared.

Paper Details

Date Published: 9 August 2016
PDF: 6 pages
Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 99082R (9 August 2016); doi: 10.1117/12.2233767
Show Author Affiliations
Emily C. Martin, Univ. of California, Los Angeles (United States)
Michael P. Fitzgerald, Univ. of California, Los Angeles (United States)
Ian S. McLean, Univ. of California, Los Angeles (United States)
Evan Kress, Univ. of California, Los Angeles (United States)
Eric Wang, Univ. of California, Los Angeles (United States)


Published in SPIE Proceedings Vol. 9908:
Ground-based and Airborne Instrumentation for Astronomy VI
Christopher J. Evans; Luc Simard; Hideki Takami, Editor(s)

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