Current plans for space exploration are calling for more information about materials—at ever lower temperatures. The University of Arizona is making a 2-m prototype mirror for the Next Generation Space Telescope (NGST) to operate at 35 K.
© 1999 Optical Society of America
J.H. Burge, T. Peper, and S.F. Jacobs, "Thermal Expansion of Borosilicate Glass, Zerodur, Zerodur M, and Uncer amized Zerodur at Low Temperatures," Appl. Opt. 38, 7161-7162 (1999)