Filter is an optical device used to select the required radiation band. A common feature of filters is that no filter can make the imaging of celestial bodies b
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Filter is an optical device used to select the required radiation band. A common feature of filters is that no filter can make the imaging of celestial bodies brighter, because all filters will absorb certain wavelengths, making objects darker. Filter products are mainly classified according to spectral band, spectral characteristics, film material, application characteristics, etc.
Filter is an optical device used to select the required radiation band. A common feature of filters is that no filter can make the imaging of celestial bodies brighter, because all filters will absorb certain wavelengths, making objects darker. Filter products are mainly classified according to spectral band, spectral characteristics, film material, application characteristics, etc.