Full Content is available to subscribers

Subscribe/Learn More  >
Proceedings Article

Ground demonstration of an optical control system for a space-based sparse-aperture telescope

[+] Author Affiliations
David B. DeYoung, James D. Dillow, Stephen P. Corcoran, Edwina V. Andrews, Julius Yellowhair, Kevin DeVries

SVS, Inc. (USA)

Proc. SPIE 3356, Space Telescopes and Instruments V, 1156 (August 28, 1998); doi:10.1117/12.324516
Text Size: A A A
From Conference Volume 3356

  • Space Telescopes and Instruments V
  • Pierre Y. Bely; James B. Breckinridge
  • Kona, HI | March 20, 1998

abstract

SVS has recently completed a phase II small business innovative research (SBIR) project called low cost space imager (LCSI). As part of the SBIR project, a sparse aperture telescope design concept was developed. This design includes an optical control system capable of correcting the primary segments to within 38 nm piston and 17 nrad tilt as required by the optical tolerance analysis. The optical system utilizes a common secondary and primaries arranged in a Golay-6 configuration. The primaries are spherical, which eliminates the need for translation and rotation control. A laboratory experiment to validate the controls concept has been completed. This experiment culminated in the demonstration of autonomous capture, alignment, and phasing of an optical system with a three segment primary to tolerances consistent with the space optical system. The implementation of the controls scheme in the laboratory experiment is done using Matlab/Simulink for controller design and code generation the code is implemented real-time on a VME based computer system. Closed loop piston control, which utilizes a four-bin sensing scheme, of an actuated mirror to 25 nm RMS mirror motion has been demonstrated. Additionally, autonomous capture and phasing of three segmented primaries has been demonstrated. The technique for the phasing capture involves real-time implementation of image processing techniques to measure the white light fringe visibility in the far field.

© (1998) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

David B. DeYoung ; James D. Dillow ; Stephen P. Corcoran ; Edwina V. Andrews ; Julius Yellowhair, et al.
"Ground demonstration of an optical control system for a space-based sparse-aperture telescope", Proc. SPIE 3356, Space Telescopes and Instruments V, 1156 (August 28, 1998); doi:10.1117/12.324516; http://dx.doi.org/10.1117/12.324516


Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).

Figures

Tables

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

Advertisement
  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.