A filter that can be attached to the x-ray tube housing.
Black light filter (pt, mt), английский A filter that transmits ultraviolet light (320-400-nm wavelength) while suppressing the transmission of visible light of the longer wavelengths.
Wedge filter (rt), английский A filter so constructed that its thickness varies continuously or in steps from one edge to the other. wedge filters may be used to increase the uniformity of radiation in certain types of exposures.
