Physics – Optics
Scientific paper
Jan 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982spie..330..139m&link_type=abstract
IN: Optical systems engineering II; Proceedings of the Second Conference, Los Angeles, CA, January 26, 27, 1982 (A83-46587 22-74
Physics
Optics
Design Analysis, Hubble Space Telescope, Mirrors, Pointing Control Systems, Trusses, Cassegrain Optics, Fabrication, Surface Finishing
Scientific paper
A table is included giving the specifications and performance criteria of the telescope. Particular attention is given to the primary mirror and the metering truss. In discussing the former, it is noted that the backplater, faceplate, rim, and a number of elements to be put together to make a core were fabricated separately. The whole structure was assembled like a sandwich and placed in a kiln, where it was fused in such a way that the separate elements were all joined to give one large rigid lightweight blank. While in the kiln, the blank was centrally supported by a large mandrel; because of this, it 'slumped' slightly, becoming concavae on the faceplate side and convex on the backplate side. This made the subsequent grinding stage somewhat easier. The three kinds of movement that will need to be controlled by the metering truss are described.
Facey Terence A.
McCarthy John D.
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