Space Space Astronomy Laboratory
University of Wisconsin

Pictured above is the WISP instrument on the shake table at NASA Wallops environmental testing facility. HEXTEK provide the primary, corrector and the Brewster mirror blanks. The primary and corrector mirrors are Gas-Fusion technology lightweights while the Brewster mirror is a lightweight open back casting. (photo courtesy Univ. of Wisconsin, Space Astronomy Lab)

Two matching lightweight 22.3" x 10.0" Brewster mirror substrates .