University of Surrey

Test tubes in the lab Research in the ATI Dance Research

Dimensional stability testing on a space optical bench structure

Edeson, R, Morris, N, Tatnall, A and Aglietti, GS (2009) Dimensional stability testing on a space optical bench structure AIAA Journal, 47 (1). pp. 219-228.

[img] Text (licence)
Restricted to Repository staff only
Available under License : See the attached licence file.

Download (33kB)


High-performance space-based optical systems typically require structures that exhibit high levels of dimensional stability over their lifetimes. To better understand the mechanisms for dimensional instability, a novel series of tests were carried out at Rutherford Appleton Laboratory on a breadboard high-stability optical bench structure. Goals of the testing were to assess the relative stability of a pair of reference surfaces and to determine the contributions of various structural elements and joints to dimensional instability. The breadboard was subject to an intensive environmental test campaign that included thermal cycling under vacuum and random vibration testing. Metrology was performed throughout the campaign to assess the dimensional stability response to the various environmental loads. The metrology requirement was challenging, with measurements of micron-level displacement and arcsecond-level tilt over 1-meter distances being necessary in situ during environmental testing. This issue was resolved using a combination of techniques: a contacting coordinate measurement machine, laser interferometry, and optical autocollimation. The greatest levels of instability were produced by random vibration testing, though evidence of a bedding-in process implies that vibratory conditioning could be used to improve stability. Copyright © 2008 by the American Institute of Aeronautics and Astronautics. Inc. All rights reserved.

Item Type: Article
Divisions : Surrey research (other units)
Authors : Edeson, R, Morris, N, Tatnall, A and Aglietti, GS
Date : 1 January 2009
DOI : 10.2514/1.38228
Depositing User : Symplectic Elements
Date Deposited : 28 Mar 2017 15:32
Last Modified : 24 Jan 2020 13:01

Actions (login required)

View Item View Item


Downloads per month over past year

Information about this web site

© The University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom.
+44 (0)1483 300800