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Optical constants of OHARA - BSM (Borosilicate, medium-index)
S-BSM93
Wavelength:
µm
(0.3 – 2.4)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.6481267-0.011553471λ^{2}+0.015517531λ^{-2}+0.00053211731λ^{-4}-3.390687\text{×}10^{-05}λ^{-6}+2.099346\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_absolute: false
wavelength_vacuum: false
temperature: 25.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: -8.24e-07 1.36e-08 1.73e-12 4.66e-07 8.6e-10 0.197
nd: 1.640998
Vd: 56.927542
glass_code: 641569
glass_status: preferred
density: 3.7 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 6.7e-06 K-1
- temperature_range: 20 300 °C
coefficient: 8e-06 K-1
dPgF: -0.0024
climatic_resistance: 3.0
acid_resistance: 53.0
phosphate_resistance: 3.2
References
OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)
See also OHARA glass data sheets