Three Half-wave Filter and Analysis of Layer Thickness
三半波带通滤光片的制作与膜厚分析

Tooling factor is one of the most important parameters in optical thin film coating process. Calculation indicates that, while coating three half-wave filter, it is possible to roughly get this factor from the passband center position, factor variation and factor difference of different materials from the shape of measurement curve. With this method, we have produced several kinds of bandpass fileters.