Optical constants of OHARA - NSL (Niobosilicate, low-index)
NSL3
Wavelength:
µm
(0.340–0.9)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.269695-0.007150002λ^{2}+0.01337006λ^{-2}-0.0002761508λ^{-4}+6.605453\text{×}10^{-05}λ^{-6}-3.180633\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false wavelength_is_vacuum: false temperature: 25.0 °C thermal_dispersion: - type: "Schott formula" coefficients: 4.8656e-06 0.0 0.0 0.0 0.0 0.0 nd: 1.518229 Vd: 58.966406 glass_code: 518590 glass_status: preferred density: 2.53 g/cm3 thermal_expansion: - temperature_range: -30 70 °C coefficient: 8.8e-06 K-1 - temperature_range: 20 300 °C coefficient: 1.03e-05 K-1 dPgF: -0.0004
References
OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)
See also OHARA glass data sheets