It is often useful to obtain custom glasses that meet particular requirements of refractive index and dispersion for high-end optical design and applications. In the case of infrared glasses, limited experimental data are available due to difficulties in processing of these glasses and also measuring refractive indices accurately. This paper proposes methods to estimate refractive index and dispersion as a function of composition for selected infrared-transmitting glasses. Methods for refractive index determination are reviewed and evaluated, including Gladstone-Dale, Wemple-DiDomenico single oscillator, Optical basicity, and Lorentz-Lorenz total polarizability. Various estimates for a set of PbO-Bi2O3-Ga2O3 (heavy metal oxide) and As-S (chalcogenide) glasses will be compared with measured values of index and dispersion.
Revised: September 1, 2011 |
Published: June 14, 2011
Citation
McCloy J.S. 2011.Methods for Prediction of Refractive Index in Glasses for the Infrared. In Window and Dome Technologies and Materials XII, April 27, 2011, Orlando, Florida. Proceedings of the SPIE, edited by RW Tustison, 8016, Article No. 80160G. Bellingham, Washington:SPIE.PNNL-SA-78795.doi:10.1117/12.882536