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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 °C
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 °C
coefficient: 6.5e-06 K-1
- temperature_range: 20 300 °C
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