Products
Material: N-BK7(K9)
Diameter: 0.5-300mm
Shape: Round,square or rectangular
Parallelism: 3 min
Surface Quality: 60/40,40/20
Surface Flatness: λ/2
Bevel: Protective bevel as needed
Clear Aperture: ≥90%
Coating: Uncoated/AR/BBAR/HR/Metallic
BK7 and K9 are two common optical glass materials, widely used in lenses, prisms, windows and other optical components. Yutai Optics chooses K9 as an alternative material to BK7.
What is the role of the BK7 (K9) window in the visible wavelength?
Use: protect sensitive optical components (sensors, detectors, lenses) from dust, moisture or mechanical damage.
For example: laboratory instruments (microscopes, spectrometers), industrial cameras, surveillance cameras, laser printers, scanners.
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.
