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Optical Filter Characteristics

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Optical Filter Characteristics

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Optical filters can be manufactured in many physical forms and can involve single or multiple elements. An individual filter can be fabricated by applying soft coatings to separate substrate plates that are then laminated together or hard coatings deposited on different components that are then mechanically assembled together. The choice of the method of filtering, the physical form of the filter, the method of assembly of the filter, and the coating technology used to coat the optical filter substrates, will depend upon the constraints imposed by the filter specifications. Some of the most important parameters associated with the specifications of an optical filter are environmental operating conditions, physical dimensions, durability, optical surface quality, and, most importantly, the spectral filter parameters.

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