中文版|English
  Products & Ser..
Spherical Lens Achromatic Lens Ball Lens IR Lens Aspheric Lens Prism Mirror Optical Filter Window Cylindrical Lens Lens Assembly Rod Lens Test Plates

BK7 Windows

 

Optical windows are used to allow optical radiation to pass from one environment to another without allowing other elements of these environments to mix. And it does not change the wavelength distribution of the beam, the transmitted wavefront, nor does it scatter any light away from the beam.

Alpha  Optics’ BK 7 parallel windows feature low distortion, low scatter, and excellent parallelism for laser and non-laser applications.

 

Specifications:
Material: BK7 grade A optical glass
Diametre Tolerance: +0.0, -0.15mm
Thinkness Tolerance: +/-0.2mm
Clear Aperture: >85% of diametre
Parallelism: <1 arc minute(Standard), <10 arc seconds(Precision)Surface Quality: 60-40 scratch and dig(Standard), 10-5scratch and dig(Precision)
Flatness: λ/4 @632.8nm(Standard), λ/10 @632.8nm(Precision)
Wavefront Distortion: λ/4 @632.8nm(Standard), λ/10 @632.8nm(Precision)
Bevel.: 0.25mmx45deg