BK7 Window
BK7 windowhas good performance over visible and near infrared wavelength region,is ideal for applications require minimal transmitted beam deviation. It is suitable for AR coating .
Specifications of BK7 Optical Windows:
Material: BK7 grade A optical glass
Bevel: <0.25mm X 45°
Coating: Optional (Uncoated, AR, HR, PR, Coating, etc.)
|
Standard |
High Precision |
|
|
Dimension Tolerance |
+0.0/-0.1 |
+0.0/-0.02 |
|
Thickness Tolerance |
±0.1 |
±0.005 |
|
Surface quality: |
60-40 |
10-5 |
|
Clear Aperture |
>85% |
>95% |
|
Flatness(per 25mm@633nm) |
λ /2 |
λ /10 |
|
Parallelism |
3 min |
3 sec |
Choose the appropriate diameter and thickness according to your optical system design requirements. Generally, the dimensional tolerance of BK7 window lenses is ±0.1mm to ensure compatibility and stability during installation.
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