INFRASIL 301, 302 e
303
INFRASIL 301, 302 and 303 are optical quartz glass
grades manufactured by fusion of natural quartz crystals
in an electrically heated furnace. They combine
excellent physical properties with outstanding optical
characteristics especially in the IR and the visible
wavelength range. The index homogeneity is controlled
and specified either in one direction (the direction of
use or functional direction) or even in all three
dimensions.
INFRASIL 301 meets the requirements for bubble class 0
and is practically free of inclusions.
INFRASIL 302 and 303 also show a low bubble and
inclusion content.
The optical homogeneity, which is the main criteria for
very low transmitted wavefront distortion, refers to
three categories:
-
INFRASIL 301 is an
optically isotropic 3D-material. It is highly
homogeneous and has no striations in all three
dimensions. These properties are very important for
multiple axis IR-optics such as prisms, steep
lenses, beam splitters, etalons or retroreflectors.
INFRASIL 302 and 303 are homogeneous in the primary
functional direction. Weak striations, if any, are
parallel to the major faces and do not affect the
optical performance.
-
INFRASIL 302 is
the preferred material for demanding optics in one
directional use such as lenses, IR-laser windows,
optical flats.
-
INFRASIL 303 is
designed for commercial optical infrared
applications such as substrates, lightguide
elements, microscope slides and IR-windows.
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