Share Email Print

Proceedings Paper

Vibration-insensitive interferometric measurements of mirror surface figures under cryogenic conditions
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

We report on a technique to measure the surface figure of mirrors under extreme vibrational conditions. Measurements are presented of the surface figure changes of Zerodur primary mirrors with both spherical and parabolic shapes, manufactured for the NASA Deep Impact program. Conditions ranged from room temperature to 130K. The interferometer was located outside the cryogenic vacuum chamber and did not require any active or passive vibration isolation. We show measurement repeatability of better than 1/500 waves RMS at 633nm.

Paper Details

Date Published: 30 January 2003
PDF: 8 pages
Proc. SPIE 4842, Specialized Optical Developments in Astronomy, (30 January 2003); doi: 10.1117/12.461352
Show Author Affiliations
James E. Millerd, 4D Technology Corp. (United States)
Neil J. Brock, 4D Technology Corp. (United States)
James W. Baer, Ball Aerospace & Technologies Corp. (United States)
Peter T. Spuhler, Ball Aerospace & Technologies Corp. (United States)

Published in SPIE Proceedings Vol. 4842:
Specialized Optical Developments in Astronomy
Eli Atad-Ettedgui; Sandro D'Odorico, Editor(s)

© SPIE. Terms of Use
Back to Top
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?