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Proceedings Paper

Improved probe and analysis for VISAR
Author(s): Matthew E. Briggs; Willard F. Hemsing; Michael A. Shinas; Gerald Whittemore
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Paper Abstract

We have designed and used for several years now a ¼ inch O.D., 11.5 inch length optical probe for imaging light from a surface area inside a confined space. The design is based on a commercial SelFoc gradient index objective and relay rod combination with acceptance angle +-30 degrees. We have used our probe both for framing camera images and for imaging spots on a surface onto a fiber array for interferometry. Probe efficiency is 1x10-6 at an object distance of 10 centimeters, where, for imaging onto the array, the probe has a depth of field from 2 cm to infinity. If a spot size of 1 mm is acceptable, the object can be brought within a few mm. For interferometry, the probe images enough of the surface to require automation from the analysis software. Below we report our probe construction and performance calculations, and software automation and analysis improvements.

Paper Details

Date Published: 17 March 2005
PDF: 8 pages
Proc. SPIE 5580, 26th International Congress on High-Speed Photography and Photonics, (17 March 2005); doi: 10.1117/12.584280
Show Author Affiliations
Matthew E. Briggs, Los Alamos National Lab. (United States)
Willard F. Hemsing, Los Alamos National Lab. (United States)
Michael A. Shinas, Los Alamos National Lab. (United States)
Gerald Whittemore, Los Alamos National Lab. (United States)

Published in SPIE Proceedings Vol. 5580:
26th International Congress on High-Speed Photography and Photonics
Dennis L. Paisley; Stuart Kleinfelder; Donald R. Snyder; Brian J. Thompson, Editor(s)

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