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Optical constants of CDGM - LAF (Lanthanum flint)
H-LAF52

Wavelength: µm
 (0.320 – 2.400)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=3.10868845-0.0135809895λ^{2}+0.027901619λ^{-2}+0.000460094924λ^{-4}+3.20811469\text{×}10^{-05}λ^{-6}-2.81458925\text{×}10^{-07}λ^{-8}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 7.56e-06 1.95e-08 -5.14e-11 6.79e-07 7.1e-10 0.233
nd: 1.785901
Vd: 44.206711
glass_code: 786442
density: 4.39 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 5.9e-06 K-1
  - temperature_range: 20 300 °C
    coefficient: 7.2e-06 K-1
dPgF: -0.0082
climatic_resistance: 1.0

References

CDGM Zemax catalog 2017-09 (obtained from http://www.cdgmgd.com)

Data

[Expressions for n]   [CSV - comma separated]   [TXT - tab separated]   [Full database record]

INFO

CDGM Glass Co., Ltd.

CDGM Glass Co., Ltd. is a leading optical glass supplier in China with a worldwile distribution network.

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