Share Email Print
cover

Proceedings Paper

The Keck-I Cassegrain ADC
Author(s): Andrew C. Phillips; Joseph Miller; David Cowley; Vernon Wallace
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

We briefly describe the design, construction and performance of the recently-commissioned Atmospheric Dispersion Corrector (ADC) for the Keck-I Cassegrain focus. This is a "longitudinal" ADC with fused silica prisms slightly over 1- meter in diameter, designed to operate at zenith distances up to 60 degrees and over a 20 arcminute field-of-view with negligible impact on image quality and throughput. It provides dispersion compensation from 0.31 to 1.1 microns. The sol-gel-based antireflection coatings were a major technological challenge, and we encountered some previously unrecognized performance consequences of the LADC design which should be considered before adopting this design.

Paper Details

Date Published: 11 July 2008
PDF: 9 pages
Proc. SPIE 7014, Ground-based and Airborne Instrumentation for Astronomy II, 701453 (11 July 2008); doi: 10.1117/12.789930
Show Author Affiliations
Andrew C. Phillips, UCO/Lick Observatory, Univ. of California, Santa Cruz (United States)
Joseph Miller, UCO/Lick Observatory, Univ. of California, Santa Cruz (United States)
David Cowley, UCO/Lick Observatory, Univ. of California, Santa Cruz (United States)
Vernon Wallace, UCO/Lick Observatory, Univ. of California, Santa Cruz (United States)


Published in SPIE Proceedings Vol. 7014:
Ground-based and Airborne Instrumentation for Astronomy II
Ian S. McLean; Mark M. Casali, Editor(s)

© SPIE. Terms of Use
Back to Top