High Precision Short Pass Filters and Optical IR Cut off Filters

It can be made in many ways. The filter is one of them. Light filters can also be made of gas or solution. Filter is a commonly used filter, which is divided into passband filter and cut-off filter according to spectral characteristics; Spectral analysis is divided into absorption filters and interference filters. It is mainly used as an auxiliary dispersion device, such as a spectral level separator in grating spectrometers, to eliminate low-level spectral overlap. Monochromators use interference filters to separate light in an extremely narrow band range.

The filter selectively transmits light within a specific wavelength range, that is, light of different colors, while blocking the rest of the light waves. They can typically block longer and shorter wavelengths (bandpass) only through long wavelengths (long pass), short wavelengths (short pass), or wavelength bands. The passband can be narrower or wider; The transition between the maximum and minimum wave peaks can be sharp or gentle.