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Proceedings Paper

Metrology system for the Terrestrial Planet Finder Coronagraph
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Paper Abstract

The Terrestrial Planet Finder (TPF) employs an aggressive coronagraph designed to obtain better than 1e-10 contrast inside the third Airy ring. Minute changes in low-order aberration content scatter significant light at this position. One implication is the requirement to control low-order aberrations induced by motion of the secondary mirror relative to the primary mirror; sub-nanometer relative positional stability is required. We propose a 6-beam laser truss to monitor the relative positions of the two mirrors. The truss is based on laser metrology developed for the Space Interferometry Mission.

Paper Details

Date Published: 30 September 2004
PDF: 10 pages
Proc. SPIE 5528, Space Systems Engineering and Optical Alignment Mechanisms, (30 September 2004); doi: 10.1117/12.559998
Show Author Affiliations
Stuart B. Shaklan, Jet Propulsion Lab. (United States)
Luis F. Marchen, Jet Propulsion Lab. (United States)
Feng Zhao, Jet Propulsion Lab. (United States)
Robert D. Peters, Jet Propulsion Lab. (United States)
Timothy Ho, Jet Propulsion Lab. (United States)
Buck Holmes, Jet Propulsion Lab. (United States)


Published in SPIE Proceedings Vol. 5528:
Space Systems Engineering and Optical Alignment Mechanisms
Lee D. Peterson; Robert C. Guyer, Editor(s)

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