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

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