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Optical constants of SCHOTT - LaK (Lanthanum crown)
N-LAK9

Wavelength: µm
 (0.3 – 2.5)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula [ i ]

$$n^2-1=\frac{1.46231905λ^2}{λ^2-0.00724270156}+\frac{0.344399589λ^2}{λ^2-0.0243353131}+\frac{1.15508372λ^2}{λ^2-85.4686868}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 2.11e-06 1.11e-08 1.82e-12 4.74e-07 -3.47e-10 0.146
nd: 1.691
Vd: 54.71
glass_code: 691547.351
glass_status: standard
density: 3.51 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 6.3e-06 K-1
  - temperature_range: 20 300 °C
    coefficient: 7.5e-06 K-1
dPgF: -0.0071
climatic_resistance: 3.0
stain_resistance: 3.0
acid_resistance: 52.0
alkali_resistance: 1.2
phosphate_resistance: 4.3

Comments

step 0.5 available

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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