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23 September 1998 Improved characterization of GRADIUM gradient-index glasses
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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.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Boyd V. Hunter, Paul Fournier, and Steve C. Johnston "Improved characterization of GRADIUM gradient-index glasses", Proc. SPIE 3424, Inorganic Optical Materials, (23 September 1998);


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