|
BK7 Windows | Fused
Silica Windows | CaF2
Windows | Float
Glass Windows
Windows are optical glass with ground and
polished faces that are relatively parallel. They are used to isolate
two physical environments while allowing
light to pass. When selecting windows, you should consider the following:
material,
transmission, scattering, wave front distortion, parallelism and
resistance to certain environment.
Red Optronics offers all types of windows made from different materials. Special
size and materials are also available upon request. In
addition, we provide a variety of
single layer or multiplayer anti-reflecting coating on optical windows. Please refer to coating chapter for more
information.
Window Materials and Properties:
| Material |
Properties |
Applications |
| BK7 |
Transmission Range: 330-2100nm
Refractive Index: 1.5164@588nm |
Good performance
over visible and near IR spectrum in most applications.
|
| Fused Silica |
Transmission Range: 185-2500nm
Refractive Index: 1.4858@308nm
Low Thermal Expansion Coefficient: 0.54 x 10-6K |
Good performance from UV to IR
spectrum; The best choice for
resistance thermal application.
|
| Sapphire |
Transmission Range: 180-4500nm
Refractive Index: 1.755@1000nm
Strong Hardness |
Suitable for scratch
resistance applications; Good transmission over a a wide range of
spectrum: Can be made much thinner.
|
| Calcium
Fluoride |
Transmission Range: 170-7800nm
Refractive Index: 1.399@5000nm
Little Hygroscopic Susceptibility
High Thermal Expansion Coefficient: 18.85 x 10-6K |
Applicable
for a wide rang spectrum and particularly useful in IR laser
application.
|
| MgF2 |
|
Applicable
for a wide rang of spectrum and particularly useful in UV laser
application.
|
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