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

Naresh C. Mehta

doi:10.1117/12.321683

11 September 1998 Simple inexpensive adaptive optical system for large ground-based telescopes at infrared wavelengths

Naresh C. Mehta

Proceedings Volume 3353, Adaptive Optical System Technologies; (1998) https://doi.org/10.1117/12.321683
Event: Astronomical Telescopes and Instrumentation, 1998, Kona, HI, United States

Abstract

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.

Citation Download Citation

Naresh C. Mehta "Simple inexpensive adaptive optical system for large ground-based telescopes at infrared wavelengths", Proc. SPIE 3353, Adaptive Optical System Technologies, (11 September 1998); https://doi.org/10.1117/12.321683

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