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Use of the coherent mmt for diffraction limited imaging

Hebden, JC; Hege, EK; Beckers, JM; (1986) Use of the coherent mmt for diffraction limited imaging. Proceedings of SPIE - The International Society for Optical Engineering , 628 pp. 42-49. 10.1117/12.963510.

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Abstract

All six MMT telescopes can now be optically cophased simultaneously over a wide field of view yielding coherent coverage of the complete Fourier transform plane corresponding to that of a pupil-masked telescope of 6.86m aperture. Open-loop phasing control compensates for flexure-induced path-length changes due to variable gravitational loading as a function of elevation. The system has been used to produce diffraction limited images and differential images of Alpha Orionis using narrow-band (1.2&) filters centered both on Hydrogen-alpha and on a similar bandpass out of the absorption line. Corresponding wide (100a) and narrow-band images of Gamma and Epsilon Orionis show the expected result for unresolved sources at the diffraction limited resolution of the fully-phased MMT. © 1986 SPIE.

Type: Article
Title: Use of the coherent mmt for diffraction limited imaging
DOI: 10.1117/12.963510
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng
URI: http://discovery.ucl.ac.uk/id/eprint/1550459
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