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Proceedings Paper

Improved characterization of GRADIUM gradient-index glasses
Author(s): Boyd V. Hunter; Paul Fournier; Steve C. Johnston
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Paper Abstract

Last year we presented the first experimental measurements of the dispersion in GRADIUMTM glasses. These measurements provided a glimpse into the materials properties that had previously been approximated. Unfortunately, although these valuable measurements provided broad spectrum information about the material, these measurements did not provide the precision required for many white-light applications. Furthermore, it was clear last year that the modeling must be improved because of the need to accurately model the material over the natural transmission window of the glass. Therefore, LightPath has undertaken a program to provide improved experimental characterization of current and new GRADIUM materials as well as improved modeling. Experimental data will be available soon. We will therefore evaluate the accuracy and limits of dispersion modeling using the modified Sellmeier approach. We will also present some empirical guidelines for the number of coefficients required for high-precision, wide spectral band modeling.

Paper Details

Date Published: 23 September 1998
PDF: 7 pages
Proc. SPIE 3424, Inorganic Optical Materials, (23 September 1998); doi: 10.1117/12.323761
Show Author Affiliations
Boyd V. Hunter, LightPath Technologies, Inc. (United States)
Paul Fournier, LightPath Technologies, Inc. (United States)
Steve C. Johnston, Photon Engineering, LLC (United States)


Published in SPIE Proceedings Vol. 3424:
Inorganic Optical Materials
Alexander J. Marker, Editor(s)

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