Adaptive telescope with laser probe - Isoplanatism and cone effect

Details Adaptive telescope with laser probe - Isoplanatism and cone effect Adaptive telescope with laser probe - Isoplanatism and cone effect

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...235..549t&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 235, no. 1-2, Aug. 1990, p. 549-557.

Physics

Optics

69

Adaptive Optics, Backscattering, Diffraction Propagation, Laser Applications, Visible Spectrum, Astronomical Photometry, Imaging Techniques, Pupils, Turbulence Effects

Scientific paper

Adaptive telescopes may require the use of laser spots backscattered by a high altitude atmospheric layer as reference sources at visible wavelengths. A way is proposed to retrieve the three-dimensional map of the phase aberrations through the atmosphere to get, or at least to approach, diffraction limited images of sources over fields larger than the isoplanatic patch and to correct for the cone effect. This appears feasible by using a few laser spots and subpupils in a Shack-Hartmann sensor larger than the Fried parameter r(0).

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