BK7 Window

BK7 window has 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.

BK7 Window