Hubble mirror polishing Hubble Space Telescope Primary Mirror: - TopicsExpress

Hubble mirror polishing Hubble Space Telescope Primary Mirror: This photograph shows the Hubble Space Telescopes (HSTs) Primary Mirror being ground at the Perkin-Elmer Corporations large optics fabrication facility. After the 8-foot diameter mirror was ground to shape and polished, the glass surface was coated with a reflective layer of aluminum and a protective layer of magnesium fluoride, 0.1- and 0.025-micrometers thick, respectively. The purpose of the HST, the most complex and sensitive optical telescope ever made, is to study the cosmos from a low-Earth orbit. By placing the telescope in space, astronomers are able to collect data that is free of the Earths atmosphere. The Marshall Space Flight Center had responsibility for design, development, and construction of the HST and the Perkin-Elmer Corporation, in Danbury, Connecticut, developed the optical system and guidance sensors. 1er mars 1979 Image credit : NASA

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