Wholesale Surface Polished Blue Optical Glass Filter

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.