Thickness delicacy gene analysis of narrow interference bandpass filters

In this paper, delicacy gene formula was presented to describe the transmittance error which varied with thickness change of the given layer, the transmittance error bred by every layer thickness error was calculated on the basis of the narrow interference bandpass filters that we designed to use in WDM system. The affected properties of the transmittance curves was compared and analyzed, and according to the results the conclusions were attained that can be extremely useful for practical film coating processes.