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Reflective Infrared Filters

Such infrared filters are made of certain materials that reflect visible and ultraviolet light while transmitting infrared light. These materials are usually some metals or alloys, such as aluminium, silver, gold and so on. Reflective infrared filters have the advantages of high transmittance, high selectivity, narrow bandwidth, etc., but they also have the disadvantages of complicated production process, high cost, and angle sensitivity.

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