シリカガラスの屈折率分布におけるOH基の影響

概要

論文の詳細を見る
To study the effects of the fictive temperature, T_f, and the OH-group on the refractive index, n, of silica glass, several samples were prepared containing from 680 to 850 wt ppm of OH-group in different distribution patterns. Trimethoxymethylsilane was used as a raw material and hence the samples contained no detectable chlorine, whose inhomogeneous distribution was an important factor affecting local change of n for commercial silica glasses. For a sample with homogeneous OH-group distribution, the distribution pattern in n after stress free annealing was determined by measuring the local deviations in n, Δn, with a laser interferometer. The distribution pattern was considered to be due to the distribution in T_f. The Δn distributions observed for the annealed samples with various OH-group distribution patterns agreed well with those calculated as a simple summation of the Δn due to the local deviation in OH-group, i.e. Δn=-1x10^<-7>/ΔOH (wt ppm), and the Δn due to the local. deviation in T_f. A way to manufacture silica glass with sufficiently homogeneous refractive index distribution was discussed.
社団法人日本セラミックス協会の論文
1992-03-01