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Filters are used to selectively transmit or reject a wavelength or range of wavelengths. Optical Filters are used in applications such as fluorescence microscopy, spectroscopy, clinical chemistry, or machine vision inspection. Optical Filters are ideal for life science, imaging, industrial, or defense industries. Changchun Ruiqi offers a variety of Optical Filters for many applications, including bandpass interference, notch, edge, dichroic, color substrate, or ND. Changchun Ruiqi also offers highly durable hard coatings for applications that require high optical densities with maximum performance. Bandpass Interference Filters are designed to transmit a portion of the spectrum, while rejecting all other wavelengths. Notch Filters reject a portion of the spectrum, while transmitting all other wavelengths. Edge or Dichroic Filters transmit wavelengths that are either greater than the cut-on or shorter than the cut-off wavelengths. Color Substrate Filters utilize the material`s inherent adsorption and transmission properties, while ND Filters evenly reduce transmission across a portion of the spectrum.