Optical constants of OHARA - YGH
S-YGH52
Wavelength:
µm
(0.3 – 2.4)
Derived optical constants
n
k
logX
logY
eV
Dispersion formula
$$n^2=3.1224406-0.015600077λ^{2}+0.023832255λ^{-2}+0.00072563954λ^{-4}-3.0563799\text{×}10^{-05}λ^{-6}+2.0883401\text{×}10^{-06}λ^{-8}$$Conditions & Spec sheet
n_absolute: false
λ_vacuum: false
temperature: 25.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 2.29e-06 1.57e-08 4.79e-12 6.43e-07 2.12e-10 0.137
n_d: 1.786500
V_d: 50.001717
glass_code: 787500
glass_status: special
density: 4.79 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 6.3e-06 K-1
- temperature_range: 20 300 °C
coefficient: 7.7e-06 K-1
ΔP_gF: -0.0093
climatic_resistance: 1.0
acid_resistance: 4.0
phosphate_resistance: 1.0
References
OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)
See also OHARA glass data sheets