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Proceedings Paper

Range-gated metrology: an ultra-compact sensor for dimensional stabilization
Author(s): Oliver P. Lay; Serge Dubovitsky; Daniel A. Shaddock; Brent Ware; Christopher S. Woodruff
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Paper Abstract

Point-to-point laser metrology systems can be used to stabilize large structures at the nanometer levels required for precision optical systems. Existing sensors are large and intrusive, however, with optical heads that consist of several optical elements and require multiple optical fiber connections. The use of point-to-point laser metrology has therefore been limited to applications where only a few gauges are needed and there is sufficient space to accommodate them. Range-Gated Metrology is a signal processing technique that preserves nanometer-level or better performance while enabling: (1) a greatly simplified optical head - a single fiber optic collimator - that can be made very compact, and (2) a single optical fiber connection that is readily multiplexed. This combination of features means that it will be straightforward and cost-effective to embed tens or hundreds of compact metrology gauges to stabilize a large structure. In this paper we describe the concept behind Range-Gated Metrology, demonstrate the performance in a laboratory environment, and give examples of how such a sensor system might be deployed.

Paper Details

Date Published: 23 July 2008
PDF: 8 pages
Proc. SPIE 7018, Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation, 70181A (23 July 2008); doi: 10.1117/12.789437
Show Author Affiliations
Oliver P. Lay, Jet Propulsion Lab. (United States)
Serge Dubovitsky, Jet Propulsion Lab. (United States)
Daniel A. Shaddock, Jet Propulsion Lab. (United States)
Brent Ware, Jet Propulsion Lab. (United States)
Christopher S. Woodruff, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 7018:
Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation
Eli Atad-Ettedgui; Dietrich Lemke, Editor(s)

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