Material: BK7 Glass Or Fused Silica
Flatness: 2λ Per 25 Mm
Surface Quality: 80/50 Scratch/Dig
Parallelism: 3 Min
Dimension Tolerance: +/-0.2mm
Coating: Vacuum-deposited Metallic Alloy
Optical Density Tolerance: +/-5%
Bevel (face Width X 45°): < 0.25mm
Packaging: Carton packaging
Productivity: 1000PCS per year
Place of Origin: China
HS Code: 9001909090
Port: Ji Nan,Qing Dao,Shang Hai
BK7 Optical Windows are one of the most common glass. It has a transmission range of 380nm ~ 2100nm. Optical Windows BK7( K9 ) has high homogeneity, no bubbles and low impurities, which can be used directly as transmission optical materials. BK7 has high hardness and good scratch resistance. However, the thermal expansion coefficient is large and is not recommended for temperature sensitive applications.
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