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Proceedings Paper

Wavelength-encoded fiber optic angular displacement sensor
Author(s): William B. Spillman; Robert E. Rudd; Frederick G. Hoff; Douglas R. Patriquin; Jeffrey R. Lord
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Paper Abstract

Knowledge of angular displacement is important for many system applications. There have been numerous optical techniques applied to this sensing need with the most pervasive at present being the optical code plate sensor. Other optical measurement techniques have not been as widely used due to their limited angular measurement range. An alternative to code plate sensing is described here that uses period modulated diffraction gratings attached to the interior of a rotatable element. Rotation of the element or anything to which it is attached has the result that the bandpass wavelength of the sensor is modulated due to the change in the grating segment being illuminated. The sensor is interrogated via optical fibers together with an LED source and high speed spectrometer and can measure angular displacements approaching 2ir. Sensor performance is quantified and compared with existing sensor technology.

Paper Details

Date Published: 1 February 1991
PDF: 7 pages
Proc. SPIE 1367, Fiber Optic and Laser Sensors VIII, (1 February 1991); doi: 10.1117/12.24744
Show Author Affiliations
William B. Spillman, Simmonds Precision (United States)
Robert E. Rudd, Simmonds Precision (United States)
Frederick G. Hoff, Simmonds Precision (United States)
Douglas R. Patriquin, Simmonds Precision (United States)
Jeffrey R. Lord, Simmonds Precision (United States)


Published in SPIE Proceedings Vol. 1367:
Fiber Optic and Laser Sensors VIII
Ramon P. DePaula; Eric Udd, Editor(s)

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