However, the production process of such bandpass optical filters has become more expensive. Third, the bandwidth, the bandwidth can not be said to be good or narrow, but generally speaking, in bandpass optical filters, the higher the transmittance, the narrower the bandwidth, and the lower the cut-off depth OD value. Second, the cut-off depth of band-pass optical filters, the better the cut-off depth is, the better the effect of clutter on induction components can be shielded, which will make the optical induction elements respond to more accurate signals. What are the factors that affect the price of band-pass optical filters?įirst, the central wavelength, the peak wavelength, generally speaking, the higher the transmittance, but not necessarily, in the ultraviolet band of biological instrument filters do not need this high transmittance. At present, bandpass optical filters are widely used as optical components for filtering and selecting spectral lines. Its main function is to select the spectrum of light, so that the required light passes through, the light cut-off of unnecessary wavelength. This kind of optical filter is collectively called band-pass optical filter.
In a certain band, there is only a small band with high transmittance in the middle and a high reflectivity cut-off band on both sides of the band.
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