A filter that attenuates or blocks light in a specific wavelength band to a low level while maintaining high transmittance for light in other wavelength bands. Also known as band stop or band rejection.
A bandpass filter is generally used to transmit only light in a specific wavelength band, but this notch filter has the function of not transmitting only light in a specific band.
Attenuates light in a specific wavelength band (stopband) to a very low level.