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Design, Implementation, and On-Sky Performance of an Advanced Apochromatic Triplet Atmospheric Dispersion Corrector for the Magellan Adaptive Optics System and VisAO Camera
- Source :
- Publications of the Astronomical Society of the Pacific. 125:966-975
- Publication Year :
- 2013
- Publisher :
- IOP Publishing, 2013.
-
Abstract
- We present the novel design, laboratory verification, and on-sky performance of our advanced triplet atmospheric dispersion corrector (ADC), an important component of the Magellan Adaptive Optics system (MagAO), which recently achieved first light in December 2012. High-precision broadband (0.5-1.0 microns) atmospheric dispersion correction at visible wavelengths is essential both for wavefront sensing (WFS) on fainter guide stars, and for performing visible AO science using our VisAO science camera. At 2 airmasses (60 degrees from zenith) and over the waveband 500-1000 nm, our triplet design produces a 57% improvement in geometric rms spot size, a 33% improvement in encircled energy at 20 arcsec radius, and a 62% improvement in Strehl ratio when compared to a conventional doublet design. This triplet design has been fabricated, tested in the lab, and integrated into the MagAO WFS and the VisAO science camera. We present on-sky results of the ADC in operation with the MagAO system. We also present a zero-beam-deviation triplet ADC design, which will be important to future AO systems that require precise alignment of the optical axis over a large range of airmasses in addition to diffraction-limited broadband dispersion correction.<br />Comment: PASP, August 2013
- Subjects :
- Physics
Wavefront
business.industry
FOS: Physical sciences
Strehl ratio
Astronomy and Astrophysics
First light
Encircled energy
Optical axis
Optics
Space and Planetary Science
Apochromat
Dispersion (optics)
Astrophysics - Instrumentation and Methods for Astrophysics
business
Adaptive optics
Instrumentation and Methods for Astrophysics (astro-ph.IM)
Subjects
Details
- ISSN :
- 15383873 and 00046280
- Volume :
- 125
- Database :
- OpenAIRE
- Journal :
- Publications of the Astronomical Society of the Pacific
- Accession number :
- edsair.doi.dedup.....6822ec142485c178eb400ff139a00049