29 January 1989 The MMT7 Mirror: Analysis Of The Rms Difference Specifications And Their Impact On Fabrication And Testing
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Abstract
The figure-quality specifications for the seventh Multiple Mirror Telescope (MMT7) mirror were unusual in that they were defined in terms of rms differences. Recognizing that the atmosphere can be the limiting factor in telescope performance, the specifications for the MMT7 mirror, a 1.8-m, f/2.7 parabola, were derived from analysis of the wavefront irregularities induced by the atmosphere on a nominally perfect planar wavefront from a star. This approach to mirror specifications apparently was first taken with the 4.2-m Herschel Telescope primary mirror, fabricated at Grubb-Parsons.
© (1989) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
David S. Anderson, David S. Anderson, Robert C Crawford, Robert C Crawford, } "The MMT7 Mirror: Analysis Of The Rms Difference Specifications And Their Impact On Fabrication And Testing", Proc. SPIE 0966, Advances in Fabrication and Metrology for Optics and Large Optics, (29 January 1989); doi: 10.1117/12.948080; https://doi.org/10.1117/12.948080
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