Cryogenic optical testing results for the Subscale Beryllium Mirror Demonstrator (SBMD)

Details Cryogenic optical testing results for the Subscale Beryllium Mirror Demonstrator (SBMD) Cryogenic optical testing results for the Subscale Beryllium Mirror Demonstrator (SBMD)

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001spie.4451...15h&link_type=abstract

Proc. SPIE Vol. 4451, p. 15-26, Optical Manufacturing and Testing IV, H. Philip Stahl; Ed.

Physics

Optics

Scientific paper

An Optical Testing System (OTS) has been developed to measure the figure and radius of curvature of Next Generation Space Telescope (NGST) developmental mirrors in a vacuum, cryogenic environment using the X-Ray Calibration Facility (XRCF) at Marshall Space Flight Center (MSFC). The OTS consists of a WaveScope Shack-Hartmann sensor from Adaptive Optics Associates as the main instrument and a Leica Disto Pro distance measurement instrument. Testing is done at the center of curvature of the test mirror and at a wavelength of 632.8 nm. The error in the figure measurement is

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