Family of fiber based confocal and quasi-confocal microprobes

John A. Penkethman

doi:10.1117/12.188017

30 September 1994 Family of fiber based confocal and quasi-confocal microprobes

John A. Penkethman

Proceedings Volume 2263, Current Developments in Optical Design and Optical Engineering IV; (1994) https://doi.org/10.1117/12.188017
Event: SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, 1994, San Diego, CA, United States

Abstract

The basis of confocal microprobes, in general, is that light or other radiation is focused to a point where it is scattered by some material under study and then collected by a lens and detector system which is also focused on that point. The amount of radiation collected at the detector is then indicative of the scattering properties of the material at the common focus. This paper describes a family of related microprobes using optical fibers for delivering light to and from the focus. A novel arrangement is described wherein the focal points of the source and detector are not confocal but adjacent. This quasi-confocal arrangement has some very useful properties for detecting surfaces and investigating surface topography.

Citation Download Citation

John A. Penkethman "Family of fiber based confocal and quasi-confocal microprobes", Proc. SPIE 2263, Current Developments in Optical Design and Optical Engineering IV, (30 September 1994); https://doi.org/10.1117/12.188017

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