Optical constants of OHARA - BSM (Borosilicate, medium-index)
BSM4
Wavelength:
µm
(0.360–0.9)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.559693-0.01014464λ^{2}+0.01426178λ^{-2}+0.0004753199λ^{-4}-3.128766\text{×}10^{-05}λ^{-6}+1.735988\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 25.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 4.8681e-06 0.0 0.0 0.0 0.0 0.0
nd: 1.612716
Vd: 58.749129
glass_code: 613588
glass_status: preferred
density: 3.55 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 6.6e-06 K-1
- temperature_range: 20 300 °C
coefficient: 7.6e-06 K-1
dPgF: -0.0014
References
OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)
See also OHARA glass data sheets