Optical constants of OHARA - BSM (Borosilicate, medium-index)
BSM24
Wavelength:
µm
(0.3 – 2.4)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.56958-0.0086466584λ^{2}+0.016903144λ^{-2}+7.624944\text{×}10^{-05}λ^{-4}+2.6138532\text{×}10^{-05}λ^{-6}-7.4670354\text{×}10^{-07}λ^{-8}$$Conditions & Spec sheet
n_absolute: false wavelength_vacuum: false temperature: 25.0 ℃ thermal_dispersion: - type: "Schott formula" coefficients: 5.26e-06 0.0 0.0 0.0 0.0 0.0 nd: 1.617646 Vd: 55.049782 glass_code: 618551 glass_status: preferred density: 3.63 g/cm3 thermal_expansion: - temperature_range: -30 70 ℃ coefficient: 6.5e-06 K-1 - temperature_range: 20 300 ℃ coefficient: 7.6e-06 K-1 dPgF: -0.0021 acid_resistance: 51.2 phosphate_resistance: 2.2
References
OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)
See also OHARA glass data sheets