Full Content is available to subscribers

Subscribe/Learn More  >
Proceedings Article

Neural network adaptive optics for the multiple-mirror telescope

[+] Author Affiliations
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.

Univ. of Arizona (USA)

William G. Hulburd, David G. Sandler

Thermo Electron Technologies Corp. (USA)

Proc. SPIE 1542, Active and Adaptive Optical Systems, 148 (December 1, 1991); doi:10.1117/12.48802
Text Size: A A A
From Conference Volume 1542

  • Active and Adaptive Optical Systems
  • Mark A. Ealey
  • San Diego, CA | July 21, 1991

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 SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Peter L. Wizinowich ; Michael Lloyd-Hart ; Brian A. McLeod ; D'nardo Colucci ; Richard G. Dekany, et al.
"Neural network adaptive optics for the multiple-mirror telescope", Proc. SPIE 1542, Active and Adaptive Optical Systems, 148 (December 1, 1991); doi:10.1117/12.48802; http://dx.doi.org/10.1117/12.48802


Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).

Figures

Tables

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

Advertisement
  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.