Optical constants of CDGM - LAK (Lanthanum crown)
H-LAK6A
Wavelength:
µm
(0.302–2.400)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{1.13018444λ^2}{λ^2-81.4541493}+\frac{1.60589λ^2}{λ^2-0.00817222723}+\frac{0.207868982λ^2}{λ^2-0.030380314}$$Conditions & Spec sheet
n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: 2.73e-06 1.81e-08 4.81e-11 6.35e-07 -7.14e-10 0.117
nd: 1.693500
Vd: 53.380441
glass_code: 694534
density: 3.59 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 5.6e-06 K-1
- temperature_range: 20 300 °C
coefficient: 7.3e-06 K-1
dPgF: -0.0082
climatic_resistance: 1.0
References
CDGM Zemax catalog 2022-06 (obtained from http://www.cdgmgd.com)
See also CDGM optical glass data sheets