Design of the Apache-Point Observatory 3.5-METER Telescope - Part Two - Deformation Analysis of the Primary Mirror

Details Design of the Apache-Point Observatory 3.5-METER Telescope - Part Two - Deformation Analysis of the Primary Mirror Design of the Apache-Point Observatory 3.5-METER Telescope - Part Two - Deformation Analysis of the Primary Mirror

Jan 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986spie..628..377s&link_type=abstract

Advanced Technology Optical Telescopes III, Proceedings of the Meeting held 3-6 March 1986, in Tucson, AZ. Edited by Larry Barr

Physics

1

Scientific paper

The authors have calculated the deflection of the surface of a 3.5 meter diameter borosilicate mirror using the finite element method. The mirror is a 0.46 m thick honeycomb structure with 25 mm thick face plates and 13 mm ribs. The cell spacing is 0.192 m and is regular except near the inner and outer perimeters. Axial support for the mirror will be provided by 48 air pistons. The effects of thickness variations in fabrication of the mirror are presented and are small for the magnitudes of the variations expected. Several thermal load cases are described.

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