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Spectral FiltersThorlabs' selection of dielectric-coated spectral filters are presented here. Bandpass and laser line filters are available in the visible, near-IR, and infrared ranges. Our bandpass filters feature a dielectric-stack Fabry-Pérot interferometer design. Our premium bandpass filters are hard-coated for higher transmission and are more durable and longer-lasting than our standard bandpass filters. We offer an IR blocking filter that rejects light in the NIR range.