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Proceedings Paper

Mirror seeing control in thick solid mirrors and the planned upgrade of the McMath-Pierce Solar Telescope
Author(s): Lawrence D. Barr; William Charles Livingston
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Paper Abstract

It is well known that telescope mirrors can produce seeing effects when they are at a different temperature than the adjacent air. The mirror acts as a reservoir for heat that can be convected to/from the air. In this paper we will discuss some tactics for minimizing mirror seeing in nighttime and daytime (solar) telescopes. Aluminum mirrors with internal fluid cooling appear to be the optimum choice for mirror substrates as a means for reducing mirror seeing. However, the mirrors must be actively corrected for the distortions caused by thermal gradients. The planned provisions are described.

Paper Details

Date Published: 15 October 1993
PDF: 13 pages
Proc. SPIE 1931, Metal Mirrors, (15 October 1993); doi: 10.1117/12.158744
Show Author Affiliations
Lawrence D. Barr, Barr Engineering Arts (United States)
William Charles Livingston, National Optical Astronomy Observatories (United States)


Published in SPIE Proceedings Vol. 1931:
Metal Mirrors

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