Suppression filters are used to filter out certain wavelength ranges in the
visible or non-visible parts of the spectrum in order to obtain specific image
Daylight suppression filters prevent visible light from impinging on the image
information. The image is only generated across those UV and/or IR ranges of
the spectrum to which the camera sensor is still sensitive. The capture of
fluorescent objects is an example of their use.
Daylight suppression filters are often used together with a certain UV and IR
illumination to utilise the specific reflexion of the captured object.