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Optical constants of SCHOTT - LaK (Lanthanum crown)
N-LAK22

Wavelength: µm
 (0.31–2.5)  
 

Complex refractive index (n+ik)[ i ]


n   k   LogX   LogY   eV

Derived optical constants

Dispersion formula [ i ]

$$n^2-1=\frac{1.14229781λ^2}{λ^2-0.00585778594}+\frac{0.535138441λ^2}{λ^2-0.0198546147}+\frac{1.04088385λ^2}{λ^2-100.834017}$$

Conditions & Spec sheet

n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 1.36e-06 1.49e-08 -1.29e-11 3.41e-07 2.09e-10 0.262
nd: 1.65113
Vd: 55.89
glass_code: 651559.377
glass_status: standard
density: 3.768 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 6.6e-06 K-1
  - temperature_range: 20 300 °C
    coefficient: 7.4e-06 K-1
dPgF: -0.0031
climatic_resistance: 2.0
stain_resistance: 2.0
acid_resistance: 51.2
alkali_resistance: 1.0
phosphate_resistance: 2.3

Comments

References

SCHOTT Zemax catalog 2017-01-20b (obtained from http://www.schott.com)
See also SCHOTT glass data sheets

Data

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

INFO

SCHOTT AG

SCHOTT AG is a German glass manufacturer. SCHOTT also publishes a glass catalog (SCHOTT Optical Glass Datasheets), which is a standard reference for the properties of many optical glasses.

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