Hobby-Eberly primary mirror fabrication

Details Hobby-Eberly primary mirror fabrication Hobby-Eberly primary mirror fabrication

Sep 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995spie.2536..344p&link_type=abstract

Proc. SPIE Vol. 2536, p. 344-349, Optical Manufacturing and Testing, Victor J. Doherty; H. Philip Stahl; Eds.

Physics

Scientific paper

The 11-meter primary mirror of the Hobby-Eberly Telescope consists of 91 hexagonal segments. Each segment is 1 meter across (flat to flat). The unique design of this telescope allows for a spherical radius of curvature on each segment. Requirements are that each segment's radius of curvature match to within +/- 0.5 mm of the nominal 26,165 mm radius, and that the surface figure be within 0.033 micrometers RMS. The optical fabrication, testing, and assembly of these segments will be discussed along with a description of the segment mounting scheme.

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