Use of the coherent MMT for diffraction limited imaging

Details Use of the coherent MMT for diffraction limited imaging Use of the coherent MMT for diffraction limited imaging

Jan 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986spie..628...42h&link_type=abstract

IN: Advanced technology optical telescopes III; Proceedings of the Meeting, Tucson, AZ, Mar. 3-6, 1986 (A87-35201 15-89). Bellin

Computer Science

1

Diffraction Limited Cameras, Mirrors, Optical Paths, Phased Arrays, Reflecting Telescopes, Supergiant Stars, Imaging Techniques, Least Squares Method, Speckle Patterns, Stellar Structure

Scientific paper

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 6.86-m 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 A) filters centered both on Hydrogen-alpha and on a similar bandpass out of the absorption line. Corresponding wide (100 A) 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.

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