English
An optical filter is an optical element used to select the desired radiation band and filter out light that does not require a range of wavelengths. Usually divided into absorption filter, interference filter and diffraction filter.
Optical filters are a class of optical components designed to selectively transmit, block, or attenuate specific spectral wavelengths. Based on their functional characteristics, they can be categorized into bandpass filters, longpass filters, shortpass filters, notch filters, dichroic filters, and neutral density filters. In terms of manufacturing processes, they are classified into interference filters and absorption color filters. These filters are widely used in industries and applications such as spectral analysis, biomedical imaging, machine vision, fluorescence microscopy, and industrial automation.
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