Colorless Optical Glass K9(BK7)

Colorless optical glass K9 (BK7) is a high borosilicate crown glass widely used in the field of optics, with excellent optical properties and chemical stability. Colorless Optical Glass ,Quartz Glass,Colorless Optical GlassK9（BK7),The following are its main features and application comparisons: 1. Comparison of basic characteristics Characteristics                       K9 (Chinese brand)            BK7 (German Schott brand) Refractive index                    1.51630                              1.51680 Abbe number                       64.06                                  64.17 Light transmission range     350-2000nm                      380-2100nm The main components are  SiO ₂ (69.13%),                    similar to K9, but with higher process standards B ₂ O ∝ (10.75%), and Na ₂ O (10.40%),  2. Performance differences Optical Uniformity: BK7 (N-BK7) has better refractive index uniformity and is suitable for high-precision optical systems such as lasers and astronomical telesco…