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 |
|
Fused Silica |
Transmission Range: 185-2500nm
Refractive Index: 1.4858@308nm
Low Thermal Expansion Coefficient: 0.54 x 10-6K |
|
Sapphire |
Transmission Range: 180-4500nm
Refractive Index: 1.755@1000nm
Strong Hardness
|
|
Calcium
Fluoride |
Transmission Range: 170-7800nm
Refractive Index: 1.399@5000nm
Little Hygroscopic Susceptibility
High Thermal Expansion Coefficient: 18.85 x 10-6K
|
IR laser applications
|
MgF2 |
Transmission Range: 120-7000nm
Refractive Index: 1.376@700nm
|
UV laser applications
|
|
|