Physics – Optics
Scientific paper
Jul 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002apopt..41.3781w&link_type=abstract
Applied Optics, vol. 41, iss. no. 19, p. 3781-3789
Physics
Optics
3
Adaptive Optics, Charge Coupled Devices, Errors, Image Transducers, Infrared Spectra, Interferometry, Telescopes, Wave Fronts
Scientific paper
A little-used interferometric modification to the classical Hartmann optical test is being used for active optics corrections at the 6.5-m Multiple Mirror Telescope (MMT) Observatory. The technique produces compact interference spots whose positions depend on discrete wave-front phase-difference errors. A diffraction model illustrates the formation of interference spots. The limitations on wave-front sampling that are due to atmospheric seeing are estimated. Two data reduction matrix strategies are given. A single correction of collimation and primary mirror figure produces a nearly diffraction-limited telescope image. Wave-front polynomial coefficients ranging from several nanometers to several micrometers in amplitude are reliably detected.
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