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Optical constants of CDGM - LAK (Lanthanum crown)
D-LAK52-25

Wavelength: µm
 (0.280 – 2.400)  
 

Complex refractive index (n+ik)[ i ]


n   k   LogX   LogY   eV

Derived optical constants

Dispersion formula [ i ]

$$n^2-1=\frac{1.04345567λ^2}{λ^2-0.017366945}+\frac{0.888612736λ^2}{λ^2-0.00301494124}+\frac{1.2310265λ^2}{λ^2-87.1255673}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 20.0 ℃
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 1.8e-06 1.72e-08 -5.24e-11 4.52e-07 1.37e-10 0.229
nd: 1.729240
Vd: 53.851219
glass_code: 729539
density: 4.0 g/cm3
thermal_expansion:
  - temperature_range: -30 70 ℃
    coefficient: 6.1e-06 K-1
  - temperature_range: 20 300 ℃
    coefficient: 7.8e-06 K-1
dPgF: -0.0084
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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