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Metrology system for the Terrestrial Planet Finder CoronagraphThe 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.
Document ID
20060043752
Document Type
Conference Paper
External Source(s)
Authors
Shaklin, Stuart
Marchen, Luis
Zhao, Feng
Peters, Robert D.
Ho, Tim
Holmes, Buck
Date Acquired
August 23, 2013
Publication Date
August 2, 2004
Subject Category
Lunar and Planetary Science and Exploration
Meeting Information
International Society for Optical Engineering (SPIE) Annual Meeting, Optical Science and Technology(Denver, CO)
Distribution Limits
Public
Copyright
Other
Keywords
Terrestrial Planet Finder (TPF)
Laser Meterology