Abstract

Laser illumination of a lightguide fiber, coated with a transparent material, generates a scattering pat- tern which is characteristic of the geometry and material properties of the fiber and coating.^1,2 In particular, the location of the fiber within the coating can be determined and feedback control applied during the coating application process to maintain concentricity.^1,3 Light-scattering theory has been previously applied to single coatings on lightguide fibers where the fiber diameter is 110-125 μm and the coating diameter is 225-250 μm.

© 1983 Optical Society of America