BK7/K9 optical glass is widely used in the manufacture of optical lenses, windows, prisms and other optical components.
It can provide high-quality imaging and accurate optical effects, and is widely used in photography, telescopes, microscopes and other equipment.
The optical performance of K9 glass can meet the demanding imaging requirements, and can effectively reduce optical distortion and scattering.
SiO2=69.13% B2O3=10.75% BaO=3.07% Na2O=10.40% K2O=6.29% As2O3=0.36%
Its optical constants are: refractive index = 1.51630 dispersion = 0.00806 Abbe number = 64.06
![spectrum-BK7[K9] optical glass](https://opticalglassfilter.com/wp-content/uploads/2023/09/spectrum-BK7K9-optical-glass.png "spectrum-BK7[K9] optical glass")