Improved probe and analysis for VISAR

Matthew E. Briggs; Willard F. Hemsing; Michael A. Shinas; Gerald Whittemore

doi:10.1117/12.584280

17 March 2005 Improved probe and analysis for VISAR

Matthew E. Briggs, Willard F. Hemsing, Michael A. Shinas, Gerald Whittemore

Proceedings Volume 5580, 26th International Congress on High-Speed Photography and Photonics; (2005) https://doi.org/10.1117/12.584280
Event: 26th International Congress on High-Speed Photography and Photonics, 2004, Alexandria, Virginia, United States

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.

Citation Download Citation

Matthew E. Briggs, Willard F. Hemsing, Michael A. Shinas, and Gerald Whittemore "Improved probe and analysis for VISAR", Proc. SPIE 5580, 26th International Congress on High-Speed Photography and Photonics, (17 March 2005); https://doi.org/10.1117/12.584280

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