Mathematics – Logic
Scientific paper
Nov 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988pasp..100.1399b&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 100, Nov. 1988, p. 1399-1404.
Mathematics
Logic
6
Cosmology, Mirrors, Rotating Fluids, Telescopes, Image Resolution, Liquid Surfaces, Low Cost, Tracking (Position), Vibration Damping
Scientific paper
Liquid mirrors promise to give very large telescopes at low cost making them ideal instruments for cosmological studies. The concept, past work, recent observations, and present unpublished optical shop tests are briefly reviewed. Tests on a 1.5-m liquid mirror indicate an excellent image and surface quality. Imagery and Ronchi tests indicate that a point-spread function having a FWHM of the order of 0.3 arcsecond can be obtained. In particular, bars having a width of 0.5 arcsecond and a separation of 1 arcsecond between their centers are clearly and cleanly resolved. Simple improvements should improve image quality even further. The mirror has a thin mercury layer that decreases costs and renders it less sensitive to vibrations and disturbances due to the wind.
Boily Edouard
Borra Ermanno F.
Content Robert
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