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Optical constants of OHARA - NBM (Niobate, medium-index)
S-NBM51
Wavelength:
µm
(0.32 – 2.4)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.37023101λ^2}{λ^2-0.00871920342}+\frac{0.177665568λ^2}{λ^2-0.0405725552}+\frac{1.30515471λ^2}{λ^2-112.703058}$$Conditions & Spec sheet
n_absolute: false
wavelength_vacuum: false
temperature: 25.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 3.21e-06 1.49e-08 -3.78e-11 5.35e-07 6.88e-10 0.25
nd: 1.613397
Vd: 44.267706
glass_code: 613443
density: 2.93 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 6.5e-06 K-1
- temperature_range: 20 300 °C
coefficient: 7.8e-06 K-1
dPgF: -0.0065
climatic_resistance: 2.0
acid_resistance: 1.0
phosphate_resistance: 1.0
Comments
Recommended
References
OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)
See also OHARA glass data sheets