Optical constants of OHARA - NSL (Niobosilicate, low-index)
NSL5
Wavelength:
µm
(0.340–0.9)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2=2.284302-0.008132863λ^{2}+0.01240948λ^{-2}-7.446766\text{×}10^{-06}λ^{-4}+2.86937\text{×}10^{-05}λ^{-6}-1.237616\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 25.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: -1.9066e-06 0.0 0.0 0.0 0.0 0.0
nd: 1.522494
Vd: 59.790926
glass_code: 522598
glass_status: preferred
density: 2.56 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 8.2e-06 K-1
- temperature_range: 20 300 °C
coefficient: 9.6e-06 K-1
dPgF: 0.0003
References
OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)
See also OHARA glass data sheets