We report and explain anomalous results obtained when using small core optical fibers to probe the distance to some scattering surfaces, such as machined metal surfaces. Large intensity variations occur when different sections of the surface are probed at constant distance. This is explained using a model which includes ray tracing and reflection from a surface structure exhibiting a variable surface normal vector. When the collection fiber size is increased, a larger portion of the reflected light field is sampled, and the signal intensity variations weaken.

© 2012 Optical Society of America

PDF Article


You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
Login to access OSA Member Subscription