Optical Thin Film is one or more thin layers of material deposited onto a substrate. When light passes through the lens with optical films treated, the wavelengths of the refracted or reflected light are modified. Due to this feature, we use precision thin film design to increase the reflectance or transmittance of light. Furthermore, the coatings can be designed to allow the specific range of wavelengths to pass through the lens, meeting different optical requirements.
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