The achromatic design of an atmospheric dispersion corrector for extremely large telescopes - PubMed (original) (raw)
. 2011 Aug 29;19(18):17099-113.
doi: 10.1364/OE.19.017099.
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- PMID: 21935071
- DOI: 10.1364/OE.19.017099
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The achromatic design of an atmospheric dispersion corrector for extremely large telescopes
Mehdi Bahrami et al. Opt Express. 2011.
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Abstract
For off-zenith observations with ground-based astronomical telescopes, the effect of atmospheric dispersion relative to diffraction on image size increases with telescope diameter. Correction of atmospheric dispersion in extremely large telescopes (ELTs) might become critical. A common solution for ELTs is to use linear atmospheric dispersion correctors (ADCs). In spite of their simplicity, the intrinsic chromatic aberrations of linear ADCs could render diffraction-limited imaging impossible when used in a fast focus. The chromatic problems of the linear ADC in ELTs can be resolved by replacing the linear ADC by the achromatic ADC designs presented here, which provide diffraction-limited image quality and offer several opto-mechanical advantages over linear ADCs.
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