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Measurements of Refractive Indexes and Factors Affecting Dispersion in Oxide Glasses
Author(s) -
Fujino Shigeru,
Takebe Hiromichi,
Morinaga Kenji
Publication year - 1995
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1995.tb08466.x
Subject(s) - refractive index , materials science , wavelength , dispersion (optics) , analytical chemistry (journal) , mineralogy , boron oxide , silicate , oxide , optics , ultraviolet , chemistry , optoelectronics , physics , organic chemistry , chromatography , metallurgy
Accurate refractive indexes of oxide glasses—silica, silicate, borate, aluminate, tellurite, antimonate, and heavy metal gallate glasses—are presented in the wavelength range 0.265 to 1.710 μm. Factors affecting the refractive index dispersion are discussed by using the single‐oscillator Drude‐Voigt equation. The values of n d at 0.5876 μm are affected mainly by the average resonance wavelength at the ultraviolet region through all of the glass systems. The distinguishing features of borate glasses—relatively high refractive index and low dispersion—are related to the large number of molecules, N , in a unit volume, compared with those of the other glasses. The number N determined by density measurements is related to the fraction of the four‐coordinated borons estimated by Greenblatt and Bray.