Optical constants of SCHOTT - BK (Borosilicate crown)
BK7G18
Wavelength:
µm
(0.38–2.5)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.26538542λ^2}{λ^2-0.00813104078}+\frac{0.0144191073λ^2}{λ^2-0.0543303226}+\frac{1.00323028λ^2}{λ^2-102.821166}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 1.52e-06 1.37e-08 -1.26e-11 4.36e-07 4.17e-10 0.194
nd: 1.51975
Vd: 63.58
glass_code: 520636.252
glass_status: special
density: 2.52 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 7e-06 K-1
- temperature_range: 20 300 °C
coefficient: 8.22e-06 K-1
dPgF: 0.0007
stain_resistance: 0.0
acid_resistance: 1.0
alkali_resistance: 2.0
Comments
inquiry glass
References
SCHOTT Zemax catalog 2017-01-20b (obtained from http://www.schott.com)
See also SCHOTT glass data sheets