Optical constants of OHARA - BSM (Borosilicate, medium-index)
BSM28
Wavelength:
µm
(0.365–0.9)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.568088-0.01046716λ^{2}+0.01660196λ^{-2}+0.0005809348λ^{-4}-2.356209\text{×}10^{-05}λ^{-6}+2.231142\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false wavelength_is_vacuum: false temperature: 25.0 °C thermal_dispersion: - type: "Schott formula" coefficients: -2.9384e-06 0.0 0.0 0.0 0.0 0.0 nd: 1.617722 Vd: 49.832320 glass_code: 618498 glass_status: preferred density: 3.25 g/cm3 thermal_expansion: - temperature_range: -30 70 °C coefficient: 8.4e-06 K-1 - temperature_range: 20 300 °C coefficient: 9.5e-06 K-1 dPgF: 0.0005
References
OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)
See also OHARA glass data sheets