Optical H-K9L (N-BK7)

The nd data of H-K9L is 1.5168, vd data is 64.20. H-K9L is the alternative for N-BK7. H-K9L (N-BK7) is a RoHS-compliant borosilicate crown glass. It provides excellent transmission in the visible and near infrared portions of the spectrum (350 nm – 2.0 µm). It is typically chosen whenever the additional benefits of UV fused silica. H-K9L(N-BK7) is probably the most common optical glass used in high-quality optical components.

H-K9L (N-BK7) is a hard glass that can withstand a variety of physical and chemical stressors. It is relatively scratch and chemical resistant. It also has a low bubble and inclusion content, making it a useful glass for precision lenses. All of these H-K9L (N-BK7) high precision windows can be uncoated or with broadband AR coatings: 350 – 700 nm (VIS wavelength), 650 – 1050 nm, or 1050 – 1700 nm.