抄録
The optical properties of glasses containing CdS were measured for a few specimens of difterent heat treatment. The absorption edge shifts towards longer wavelengths as the reheating progresses. However, its shape and temperature dependence are similar to those of the single crystal. The maximum wave lengths of luminescent and excitation spectra also shift according with the absorption edge and the linear relation exists between those wavenumbers. From these results, it may be infered that the optical properties of these glasses are due to CdS crystals, and their changes show that the energy gap between the filled and the conduction band in the crystals decreases with reheating, which is probably caused by the change in the lattice constants of the crystal.
