B270 ultra white glass has the characteristics of high stability to sunlight and high transmittance within the visible range of B270 products. In addition, it also has highly stable thermal and chemical properties, as well as fire polished surfaces, widely used in digital projectors, touch screens, vacuum coated substrates, and other fields.
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")