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Optical constants of CDGM - LAK (Lanthanum crown)
D-LAK5-25

Wavelength: µm
 (0.280 – 2.400)  
 

Complex refractive index (n+ik)[ i ]


n   k   LogX   LogY   eV

Derived optical constants

Dispersion formula [ i ]

$$n^2-1=\frac{0.60236351λ^2}{λ^2-3.07499779\text{×}10^{-08}}+\frac{1.15823046λ^2}{λ^2-0.0158379352}+\frac{1.30267215λ^2}{λ^2-101.976296}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 20.0 ℃
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 1.76e-06 1.72e-08 -6.77e-11 3.92e-07 6.44e-10 0.23
nd: 1.676860
Vd: 54.805426
glass_code: 677548
density: 3.37 g/cm3
thermal_expansion:
  - temperature_range: -30 70 ℃
    coefficient: 7.3e-06 K-1
  - temperature_range: 20 300 ℃
    coefficient: 9.4e-06 K-1
dPgF: -0.0069
climatic_resistance: 1.0

Comments

anneal rate:25℃/h

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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