Optical constants of OHARA - BPH (Borophosphate, high-index)
BPH40
Wavelength:
µm
(0.3–2.4)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.737477-0.013153125λ^{2}+0.023895273λ^{-2}+0.0011078302λ^{-4}-4.881918\text{×}10^{-05}λ^{-6}+5.4773972\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 25.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 1.01e-05 0.0 0.0 0.0 0.0 0.0
nd: 1.676498
Vd: 37.537388
glass_code: 677375
glass_status: preferred
density: 3.76 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 5.3e-06 K-1
- temperature_range: 20 300 °C
coefficient: 6.4e-06 K-1
dPgF: -0.0045
acid_resistance: 52.1
phosphate_resistance: 4.1
References
OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)
See also OHARA glass data sheets