At this point, it is necessary to set up the component to resist the internal force of the film surface, which can be a tubular metal frame, but also a thin film gas rib.

Because the capacity of the optical component lies crucially on the thin film thickness, monitoring the deposition thickness becomes the key to the precise production.

With the rapid increase in DWDM (Dense Wavelength Division Multiplexing) demand, dielectric thin film filters have increasingly become a key component for optical telecommunications.