Imaging a single optical fiber onto a remote, reflective target using several wavelengths - while exploiting the chromatic dispersion of the imaging optics - can be used to sense displacements of the target. Light of each wavelength is back-reflected into the fiber at a unique target position. The basic principles of the method and the optical considerations to optimize its accuracy are described. Experimental demonstrations are presented, showing precisions of around 10-20 micrometers.

Date Published: 28 September 2005
PDF: 5 pages
Proc. SPIE 5952, Optical Fibers: Applications, 59520X (28 September 2005); doi: 10.1117/12.621043

Published in SPIE Proceedings Vol. 5952:
Optical Fibers: Applications
Leszek R. Jaroszewicz; Brian Culshaw; Anna Grazia Mignani, Editor(s)