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Optical constants of OHARA - BSL (Borosilicate, low-index)
BSL3
Wavelength:
µm
(0.3 – 2.4)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.2187568-0.010447185λ^{2}+0.0095904498λ^{-2}+0.00028540943λ^{-4}-1.9183741\text{×}10^{-05}λ^{-6}+9.7004548\text{×}10^{-07}λ^{-8}$$Conditions & Spec sheet
n_absolute: false
wavelength_vacuum: false
temperature: 25.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 4.431e-06 0.0 0.0 0.0 0.0 0.0
nd: 1.498308
Vd: 65.026785
glass_code: 498650
glass_status: preferred
density: 2.36 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 5.8e-06 K-1
- temperature_range: 20 300 °C
coefficient: 6.5e-06 K-1
dPgF: -0.004
acid_resistance: 3.0
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