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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 45, Iss. 30 — Oct. 20, 2006
  • pp: 7772–7777

Expanding the realm of fiber optic confocal sensing for probing position, displacement, and velocity

E. Shafir and G. Berkovic  »View Author Affiliations

Applied Optics, Vol. 45, Issue 30, pp. 7772-7777 (2006)

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We describe a fiber optic confocal sensor (FOCOS) system that uses an optical fiber and a lens to accurately detect the position of an object at, or close to, the image plane of the fiber tip. The fiber characteristics (diameter and numerical aperture) and optics (lens F∕# and magnification) define the span and precision of the sensor and may be chosen to fit a desired application of position and displacement sensing. Multiple measurement points (i.e., fiber-tip images) may be achieved by use of multiple wavelengths in the fiber, so that each wavelength images the fiber at a different plane due to the chromatic dispersion of the optics. Further multiplexing may be achieved by adding fibers on the optical axis. A FOCOS with multiplexed fibers and wavelengths may also be used for velocity measurements.

© 2006 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(180.1790) Microscopy : Confocal microscopy
(280.0280) Remote sensing and sensors : Remote sensing and sensors

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: May 30, 2006
Revised Manuscript: July 9, 2006
Manuscript Accepted: July 10, 2006

Virtual Issues
Vol. 1, Iss. 11 Virtual Journal for Biomedical Optics

E. Shafir and G. Berkovic, "Expanding the realm of fiber optic confocal sensing for probing position, displacement, and velocity," Appl. Opt. 45, 7772-7777 (2006)

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