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Chromaticity in all-reflective telescopes for astrometry
Chromaticity in all-reflective telescopes for astrometry
- Source :
- Astronomy & Astrophysics. 449:827-836
- Publication Year :
- 2006
- Publisher :
- EDP Sciences, 2006.
-
Abstract
- Chromatic effects are usually associated with refractive optics, so reflective telescopes are assumed to be free from them. We show that all-reflective optics still bears significant levels of such perturbations, which is especially critical to modern micro-arcsecond astrometric experiments. We analyze the image formation and measurement process to derive a precise definition of the chromatic variation of the image position, and we evaluate the key aspects of optical design with respect to chromaticity. The fundamental requirement related to chromaticity is the symmetry of the optical design and of the wavefront errors. Finally, we address some optical engineering issues, such as manufacturing and alignment, providing recommendations to minimize the degradation that chromaticity introduces into astrometry.<br />10 pages, 8 figures
- Subjects :
- Image formation
Wavefront
Physics
Mathematics::Combinatorics
business.industry
Optical engineering
Astrophysics (astro-ph)
Astrophysics::Instrumentation and Methods for Astrophysics
Process (computing)
FOS: Physical sciences
Physics::Optics
Astronomy and Astrophysics
Astrometry
Astrophysics
Optics
Space and Planetary Science
Position (vector)
Chromatic scale
Chromaticity
business
Subjects
Details
- ISSN :
- 14320746 and 00046361
- Volume :
- 449
- Database :
- OpenAIRE
- Journal :
- Astronomy & Astrophysics
- Accession number :
- edsair.doi.dedup.....7ba614c92396a9fd545f0dad7d825327
- Full Text :
- https://doi.org/10.1051/0004-6361:20054180