Simple inexpensive adaptive optical system for large ground-based telescopes at infrared wavelengths

Details Simple inexpensive adaptive optical system for large ground-based telescopes at infrared wavelengths Simple inexpensive adaptive optical system for large ground-based telescopes at infrared wavelengths

Sep 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998spie.3353..477m&link_type=abstract

Proc. SPIE Vol. 3353, p. 477-487, Adaptive Optical System Technologies, Domenico Bonaccini; Robert K. Tyson; Eds.

Astronomy and Astrophysics

Astronomy

Scientific paper

Simple adaptive optical system are studied that can provide real-time atmospheric turbulence compensation at IR wavelengths for large ground-based astronomical telescopes. A tip-tilt mirror and a 7-element segmented mirror, a long with an iterative adaptive control method, called Far-Field Optimization, provide the turbulence correction. The primary advantage of far-field optimization is that no near-field phase measurements are required, thus eliminating the need for a wavefront sensor that is necessary in conventional adaptive optical systems. Far-field optimization may also somewhat relax the requirements for an artificial guide star. Computer simulations are used to investigate the application of far-field optimization in the presence of drifting atmospheric turbulence and as a function of the spatial granularity and the temporal bandwidth of the adaptive mirror.

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