Optics Materials

N-BK7 / H-K9L

N-BK7 / H-K9L

,N-BK7 is the RosH compliance material of BK7. N-BK7 is a borosilicate crown ptical glass, which has high homogeneity, low bubble and inclusion content. Its good physical and chemical properties make it widely used in visible and near IR range. Most of windows, lenses and prisms, which used in laser, optical system, optical communication, are made from N-BK7 glass.

H-K9L is the Chinese made equivalent material of N-BK7. Foctek choose the best H-K9L glass from the biggest and famous glass manufacturer- CDGMGD.

Please click here to view the detailed data sheet of H-K9L.

Transmission range: 330 nm~2100 nm, click to view the transmission curve of H-K9L
Thermal Expansion Coefficient: 7.5X10 -6 /K
Density: 2.51 g/cm 3



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