Glass & Fused Silica Windows
Glass
and fused silica windows are commonly used to isolate two atmospheric regions of
an optical system while permitting light to pass. The quality of the window can be critical.
It should be of high purity and polish in order not to affect the optical
system. When large pressure
differences are anticipated across the window extra thickness will be required
to hold the flatness and parallelism specifications.
Windows
may also be used as coating substrates for use in a wide range of applications.
Optical
windows are supplied in a wide range of materials and shapes and to various
levels of flatness and parallelism:
Material:
BK7, UV Fused Silica
Shape:
Circular, Square, Elliptical
Flatness:
λ/10, λ/4, λ/2,
2λ per 25mm.
Parallelism:
10 arcsec, 3 arcmin
Wedge:
0, 30 arcmin,
1°, 2°,
3°
We can supply circular optical windows in diameters of 10.0, 12.7, 19.1, 20.0, 25.4, 30.0, 38.1, 40.0, 50.8, 76.2 or 101.6 mm or any custom size.
We
can supply square optical windows in sides of 10.0, 12.7, 19.1, 20.0,
25.4, 30.0, 38.1, 40.0, 50.8 mm or any custom size.
We
can supply elliptical optical windows with a minor axis of 12.7, 15.0,
19.1, 25.4 mm or any custom size.
These
windows are uncoated, but coatings may be applied as required — see Coated
Windows.