Corrosion of Some Optical Glasses in Alkai Solution of SiO2
1959 Volume 28 Issue 3 Pages 141-146
Details
1959 Volume 28 Issue 3 Pages 141-146
The growth of low refractive index layer (L. I. layer) on the surface of optical glass in alkali or water solution of SiO2 is studied in detail using a polarization spectrometer and by mulitiple beam interferometry.
The glass samples used in this experiment are barium borosilicate glass (SK 16) and lead glass (SF 3).
Results obtained are as follows:
1) Dissolution of the glasses is prevented by high concentration of SiO2 in alkali solution, and the growth of thick L. I. layer is observed on SK 16 as well as on SF 3.
2) A small quantity of SiO2 in neutral or water solution has considerable effect in producing L. 1. layer on the surface of barium borosilicate glass (SK 16). But, lead glass (SF 3) is hardly affected under the same Condition.
