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Optical constants of OHARA - BSM (Borosilicate, medium-index)
BSM2
Wavelength:
µm
(0.350 – 0.9)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.540784-0.00928151λ^{2}+0.01490321λ^{-2}+0.0003779065λ^{-4}-1.245295\text{×}10^{-05}λ^{-6}+7.093602\text{×}10^{-07}λ^{-8}$$Conditions & Spec sheet
n_absolute: false
wavelength_vacuum: false
temperature: 25.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: -4.2303e-06 0.0 0.0 0.0 0.0 0.0
nd: 1.607379
Vd: 56.815789
glass_code: 607568
glass_status: preferred
density: 3.54 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 6.3e-06 K-1
- temperature_range: 20 300 °C
coefficient: 7.5e-06 K-1
dPgF: -0.001
References
OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)
See also OHARA glass data sheets