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Proceedings Paper

Seeing measurements at the Multiple Mirror Telescope obtained with a very high quality 1.8-m primary mirror
Author(s): Frederic H. Chaffee; Richard H. Cromwell
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Paper Abstract

Image-quality data are presented which were gathered at the University of Arizona's Multiple Mirror Telescope (MMT) using a very high quality 1.8-m mirror, for median image sizes of 0.72 arcsec in 8-sec integrations. The measured image is judged to have been degraded by 0.48 arcsec from that allowed by the free atmosphere by such factors as errors in telescope focus, collimation, mirror support, mirror seeing, and the combined optical figure of the five mirror surfaces required to bring the light to the image-analysis CCD. These data imply the appropriateness of a total optical error budget of 0.2 arcsec for 8-m diameter telescopes currently being designed.

Paper Details

Date Published: 1 July 1990
PDF: 5 pages
Proc. SPIE 1236, Advanced Technology Optical Telescopes IV, (1 July 1990); doi: 10.1117/12.19167
Show Author Affiliations
Frederic H. Chaffee, MMT Observatory/Univ. of Arizona (United States)
Richard H. Cromwell, Steward Observatory/Univ. of Arizona (United States)


Published in SPIE Proceedings Vol. 1236:
Advanced Technology Optical Telescopes IV
Lawrence D. Barr, Editor(s)

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