An attenuating filter provides a prescribed attenuation of the intensity
of transmitted, short-wavelength, ultraviolet light, in particular, at
wavelengths below 200 nm, that is governed by a predefinable spatial
distribution of its spectral transmittance. The filter has a transparent
substrate (3), e.g. fabricated from crystalline calcium fluoride. A
filter coating (5) fabricated from a dielectric material that absorbs
over a predefined wavelength range is applied to at least one surface (4)
of the substrate. In the case of operating wavelengths of about 193 nm,
the filter coating consists largely of tantalum pentoxide. Filters of the
type, which may be inexpensively fabricated with high yields, are noted
for their high abilities to withstand laser radiation and may be
effectively antireflection coated employing simply designed
antireflection coatings.