Optical filters select different portions of the optical spectrum to transmit. Typically, optical filters either absorb unwanted light by employing colored glass or dyes, or reflect unwanted light with interference coatings.
Used in microscopy, spectroscopy, chemical analysis, and machine vision, Optical Filters from Blue Ridge can also be used in laser applications. Optical filters for laser applications are used to reject the wavelengths within a particular range, while allowing in other wavelengths in the spectral band.