An atmospheric dispersion corrector design with milliarcsecond-level precision from 1 to 4 microns for high dispersion coronagraphy
Abstract
Differential atmospheric refraction (DAR) limits the amount of light that can be coupled into a single mode fiber and provides additional complications for any fiber tracking system. We present an atmospheric dispersion corrector (ADC) design based off of two counter-rotating prisms to fit the needs of exoplanet spectroscopy for the Keck Planet Imager and Characterizer (KPIC) from 1.1 to 4.2 microns. Due to strong telluric effects, we find that the default Zemax prescription for DAR between 2 and 4.2 microns to be inaccurate up to 15 mas when comparing against DAR models computed from first principles. Using first-principle models, we developed our own custom ADC optimization solution and achieve less than 4 mas residual dispersion in any individual science band (J, K, L) down to 60 degree zenith angles, while the whole time maintaining less than 3 mas of residual dispersion in the tracking band (H) and less than 2 mas of residual dispersion between the tracking and science bands.
Additional Information
© 2020 Society of Photo-Optical Instrumentation Engineers (SPIE). This work was supported by the Heising-Simons Foundation through grants #2019-1312 and #2015-129. J. Wang is supported by the Heising-Simons Foundation 51 Pegasi b postdoctoral fellowship. Part of this work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration (NASA). W. M. Keck Observatory is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration (NASA). The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain.Attached Files
Published - 1144754.pdf
Submitted - 2012.06007.pdf
Presentation - SPIE-AS20-0addc13f-4106-ea11-813d-005056be4d05.pdf
Files
Additional details
- Eprint ID
- 107178
- Resolver ID
- CaltechAUTHORS:20201217-151051056
- Heising-Simons Foundation
- 2019-1312
- Heising-Simons Foundation
- 2015-129
- Heising-Simons Foundation
- 51 Pegasi b Fellowship
- NASA/JPL/Caltech
- W. M. Keck Foundation
- Created
-
2020-12-17Created from EPrint's datestamp field
- Updated
-
2021-11-16Created from EPrint's last_modified field
- Series Name
- Proceedings of SPIE
- Series Volume or Issue Number
- 11447