Seeing studies on a 1.8 m mirror

Details Seeing studies on a 1.8 m mirror Seeing studies on a 1.8 m mirror

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spie.1236..492f&link_type=abstract

IN: Advanced technology optical telescopes IV; Proceedings of the Meeting, Tucson, AZ, Feb. 12-16, 1990. Part 1 (A91-23201 08-89

Computer Science

Ambient Temperature, Convective Heat Transfer, Mirrors, Surface Temperature, Honeycomb Structures, Telescopes, Temperature Control, Temperature Dependence, Zenith

Scientific paper

Interferograms of the front surface of a zenith-pointing 1.8 m mirror for a range of surface-to-air temperature differences were analyzed using two different methods to show that significant mirror seeing effects do not occur in the range of + or - 0.5 C, and may be acceptably small up to + or - 1 C. Mirror seeing was shown to comply with Kolmolgorov turbulence laws up to limits that are apparently due to the test setup enclosure. Small seeing effects were discernible despite much larger image error sources.

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