NGST mirror system demonstrator from the University of Arizona

Details NGST mirror system demonstrator from the University of Arizona NGST mirror system demonstrator from the University of Arizona

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001spie.4451...27b&link_type=abstract

Proc. SPIE Vol. 4451, p. 27-38, Optical Manufacturing and Testing IV, H. Philip Stahl; Ed.

Physics

2

Scientific paper

Future space telescopes require primary mirrors that are much lighter than those currently being manufactured. They also must maintain optical tolerances while operating at cryogenic temperatures. We present a Mirror System Demonstrator for the Next Generation Space Telescope (NGST) that uses a thin glass facesheet with active control to achieve low mass and high surface quality. A 2-mm thick glass facesheet is controlled by miniature actuators and held together by a rigid carbon fiber frame. The 2-m diameter mirror system weighs only 13 kg/m2, including the glass, supports, actuators, support structure, and cabling. We present the status of the development and testing of this revolutionary mirror.

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