Response of large optical mirrors to thermal distributions

Details Response of large optical mirrors to thermal distributions Response of large optical mirrors to thermal distributions

Jan 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987spie..748..215p&link_type=abstract

IN: Structural mechanics of optical systems II; Proceedings of the Meeting, Los Angeles, CA, Jan. 13-15, 1987 (A88-34486 13-74).

Physics

2

Honeycomb Structures, Mirrors, Sandwich Structures, Thermal Environments, Weight Reduction, Borosilicate Glass, Finite Element Method, Temperature Distribution, Temperature Gradients

Scientific paper

FEM has been used to predict the optical surface distortions that can be expected in the lightweight honeycomb structure cast-borosilicate glass mirrors being contemplated for use in the National New Technology Telescope; this material has a relatively high coefficient of thermal expansion. Temperature patterns were described by a least-squares fit to a polynomial expression which was then used to predict nodal temperatures of the model. The individual terms of the polynomial describe such temperature patterns as linear-diametral and radial gradients.

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