A Wavelength Encoded Fiber Optic Position Sensor
- 13 February 1990
- proceedings article
- Published by SPIE-Intl Soc Optical Eng
- p. 442-452
- https://doi.org/10.1117/12.963063
Abstract
A fiber optic position sensor suitable for use in hazardous environments is described. The sensing element is a diffraction grating having a linear variation in period over its length. When illuminated with a broadband optical source at a fixed angle of incidence, linear translation of the grating causes a linear shift in the wavelength of the detected signal collected at a fixed angle. Maximum error of 0.1% over a range of 25 mm has been demonstrated. The sensor is compared to traditional linear position sensors.Keywords
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