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Optical constants of CDGM - LAK (Lanthanum crown)
H-LAK50A

Wavelength: µm
 (0.290–2.400)  
 

Complex refractive index (n+ik)[ i ]


n   k   LogX   LogY   eV

Derived optical constants

Dispersion formula [ i ]

$$n^2-1=\frac{0.759437631λ^2}{λ^2-0.0022319671}+\frac{1.16056755λ^2}{λ^2-91.0466256}+\frac{0.92336083λ^2}{λ^2-0.0158590987}$$

Conditions & Spec sheet

n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 5.6e-07 1.06e-08 -4.91e-11 3.57e-07 6.22e-10 0.245
nd: 1.651600
Vd: 58.403057
glass_code: 652584
density: 3.5 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 6.3e-06 K-1
  - temperature_range: 20 300 °C
    coefficient: 8.2e-06 K-1
dPgF: -0.005
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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