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Optical constants of CDGM - LAK (Lanthanum crown)
H-LAK8B

Wavelength: µm
 (0.302 – 2.400)  
 

Complex refractive index (n+ik)[ i ]


n   k   LogX   LogY   eV

Derived optical constants

Dispersion formula [ i ]

$$n^2-1=\frac{1.55351121λ^2}{λ^2-0.00793041249}+\frac{0.342243754λ^2}{λ^2-0.0280174591}+\frac{1.07011974λ^2}{λ^2-90.2590858}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 20.0 ℃
thermal_dispersion:
  - type: "Schott formula"
    coefficients: -2.05e-07 1.37e-08 -3.29e-11 4.91e-07 6.32e-10 0.249
nd: 1.720000
Vd: 50.280736
glass_code: 720503
density: 3.88 g/cm3
thermal_expansion:
  - temperature_range: -30 70 ℃
    coefficient: 7.6e-06 K-1
  - temperature_range: 20 300 ℃
    coefficient: 9.1e-06 K-1
dPgF: -0.0068
climatic_resistance: 1.0

References

CDGM Zemax catalog 2022-06 (obtained from http://www.cdgmgd.com)
See also CDGM optical glass data sheets

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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