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Proceedings Paper

Theoferometer for high-accuracy optical alignment and metrology
Author(s): Ronald W. Toland; Doug Leviton; Seth Koterba
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Paper Abstract

The accurate measurement of the orientation of optical parts and systems is a pressing problem for upcoming space missions, such as stellar interferometers, requiring the knowledge and maintenance of positions to the sub-arcsecond level. Theodolites, the devices commonly used to make these measurements, cannot provide the needed level of accuracy. This paper describes the design, construction, and testing of an interferometer system to fill the widening gap between future requirements and current capabilities. A Twyman-Green interferometer mounted on a 2 degree of freedom rotation stage is able to obtain sub-arcsecond, gravity-referenced tilt measurements of a sample alignment cube. Dubbed a 'theoferometer', this device offers greater ease-of-use, accuracy, and repeatibility than conventional methods, making it a suitable 21st-century replacemnt for the theodolite.

Paper Details

Date Published: 30 September 2004
PDF: 11 pages
Proc. SPIE 5528, Space Systems Engineering and Optical Alignment Mechanisms, (30 September 2004); doi: 10.1117/12.559969
Show Author Affiliations
Ronald W. Toland, NASA Goddard Space Flight Ctr. (United States)
Doug Leviton, NASA Goddard Space Flight Ctr. (United States)
Seth Koterba, Concordia College (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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