Optical constants of OHARA - BSM (Borosilicate, medium-index)
BSM23
Wavelength:
µm
(0.3–2.4)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.5600597-0.0097457249λ^{2}+0.015970594λ^{-2}+0.00066802115λ^{-4}-4.4172822\text{×}10^{-05}λ^{-6}+3.1024931\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 25.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 2.882e-06 0.0 0.0 0.0 0.0 0.0
nd: 1.614839
Vd: 51.172377
glass_code: 615512
glass_status: preferred
density: 3.45 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 7.1e-06 K-1
- temperature_range: 20 300 °C
coefficient: 8.2e-06 K-1
dPgF: -0.0012
acid_resistance: 4.2
phosphate_resistance: 2.0
References
OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)
See also OHARA glass data sheets