The prediction of on site telescope performance.

Details The prediction of on site telescope performance. The prediction of on site telescope performance.

Dec 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979msngr..19...16b&link_type=abstract

The Messenger, vol. 19, p. 16-18

Physics

Optics

Optical Testing

Scientific paper

The acceptance tests of an optical mirror are most often based on measurements of the slopes on its surface and the geometrical concentration of light. However, the result depends rather critically on the way of sampling and, furthermore, the final quality of the telescope is a combination (convolution) of many parameters: the optical quality, seeing, guiding, etc. Dr. D.S. Brown is responsible for the manufacturing and testing at Grubb Parson's workshop in Newcastle upon Tyne, which has recently polished the 1.5 m mirror for the new Danish telescope on La Silla and the optics for the 3.6 m CAT. Having spent most of his working life in the manufacture of astronomical optics, he has a keen interest in the prediction of actual telescope performance, based on tests in the optical shop. He explains -with a clear direction towards observing astronomers- that better test methods are now available which will let the future user know with good confidence how good (or bad) his new telescope will be, long before the first real observations are made.

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