Adaptive optics for array telescopes using piston-and-tilt wave-front sensing

Details Adaptive optics for array telescopes using piston-and-tilt wave-front sensing Adaptive optics for array telescopes using piston-and-tilt wave-front sensing

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apopt..31.6036w&link_type=abstract

Applied Optics (ISSN 0003-6935), vol. 31, no. 28, p. 6036-6046.

Physics

Optics

6

Adaptive Optics, Interferometry, Phase Error, Reflecting Telescopes, Wave Fronts, Atmospheric Turbulence, Charge Coupled Devices, Optical Paths, Pixels

Scientific paper

A near-infrared adaptive optics system operating at about 50 Hz has been used to control phase errors adaptively between two mirrors of the Multiple Mirror Telescope by stabilizing the position of the interference fringe in the combined unresolved far-field image. The resultant integrated images have angular resolutions of better than 0.1 arcsec and fringe contrasts of more than 0.6. Measurements of wave-front tilt have confirmed the wavelength independence of image motion. These results show that interferometric sensing of phase errors, when combined with a system for sensing the wave-front tilt of the individual telescopes, will provide a means of achieving a stable diffraction-limited focus with segmented telescopes or arrays of telescopes.

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