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Optical constants of OHARA - BSM (Borosilicate, medium-index)
S-BSM18
Wavelength:
µm
(0.31 – 2.4)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{0.927886025λ^2}{λ^2-0.00417549199}+\frac{0.708858526λ^2}{λ^2-0.0184691838}+\frac{1.18610897λ^2}{λ^2-122.210416}$$Conditions & Spec sheet
n_absolute: false
wavelength_vacuum: false
temperature: 25.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 3.5e-07 1.22e-08 -3.26e-11 5.94e-07 6.22e-10 0.141
nd: 1.638539
Vd: 55.380028
glass_code: 639554
density: 3.69 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 7e-06 K-1
- temperature_range: 20 300 °C
coefficient: 8.4e-06 K-1
dPgF: -0.0035
climatic_resistance: 2.0
acid_resistance: 51.2
phosphate_resistance: 2.0
Comments
Recommended
References
OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)
See also OHARA glass data sheets