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Optical constants of SCHOTT - LaK (Lanthanum crown)
N-LAK14

Wavelength: µm
 (0.31 – 2.5)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula [ i ]

$$n^2-1=\frac{1.50781212λ^2}{λ^2-0.00746098727}+\frac{0.318866829λ^2}{λ^2-0.0242024834}+\frac{1.14287213λ^2}{λ^2-80.9565165}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 2.68e-06 1.15e-08 -1.44e-11 3.72e-07 5.53e-10 0.226
nd: 1.6968
Vd: 55.41
glass_code: 697554.363
glass_status: standard
density: 3.63 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 5.5e-06 K-1
  - temperature_range: 20 300 °C
    coefficient: 6.9e-06 K-1
dPgF: -0.0079
climatic_resistance: 3.0
stain_resistance: 2.0
acid_resistance: 52.3
alkali_resistance: 1.0
phosphate_resistance: 3.0

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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