Translator Disclaimer
1 December 1991 Neural network adaptive optics for the multiple-mirror telescope
Author Affiliations +
Abstract
The MMT consists of six comounted 1.8 m telescopes from which the light is brought to a combined coherent focus. Atmospheric turbulence spoils the MMT diffraction-limited beam profile, which would otherwise have a central peak of 0.06 arcsec FWHM, at 2 microns wavelength. At this wavelength, the adaptive correction of the tilt and path difference of each telescope beam is sufficient to recover diffraction-limited angular resolution. Computer simulations have shown that these tilts and pistons can be derived by an artificial neural network, given only a simultaneous pair of in-focus and out-of-focus images of a reference star formed at the combined focus of all the array elements. We describe such an adaptive optics system for the MMT, as well as some successful tests of neural network wavefront sensing on images, and initial real-time tests of the adaptive system at the telescope; attention is given to a demonstration of the adaptive stabilization of the mean phase errors between two mirrors which resulted in stable fringes with 0.1 arcsec resolution.
© (1991) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Peter L. Wizinowich, Michael Lloyd-Hart, Brian A. McLeod, D'nardo Colucci, Richard G. Dekany, David M. Wittman, James Roger P. Angel, Donald W. McCarthy Jr., William G. Hulburd, and David G. Sandler "Neural network adaptive optics for the multiple-mirror telescope", Proc. SPIE 1542, Active and Adaptive Optical Systems, (1 December 1991); https://doi.org/10.1117/12.48802
PROCEEDINGS
11 PAGES


SHARE
Advertisement
Advertisement
RELATED CONTENT

The Giant Magellan Telescope active optics system
Proceedings of SPIE (July 22 2014)
LSST active optics system software architecture
Proceedings of SPIE (August 08 2016)
Commissioning results from the Large Binocular Telescope
Proceedings of SPIE (August 04 2010)
Commissioning results from the Large Binocular Telescope
Proceedings of SPIE (September 17 2012)
Astronomical imaging using ground-layer adaptive optics
Proceedings of SPIE (September 24 2007)

Back to Top