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Optical constants of SCHOTT - LaF (Lanthanum flint)
N-LAF34

Wavelength: µm
 (0.31–2.5)  
 

Complex refractive index (n+ik)[ i ]


n   k   LogX   LogY   eV

Derived optical constants

Dispersion formula [ i ]

$$n^2-1=\frac{1.75836958λ^2}{λ^2-0.00872810026}+\frac{0.313537785λ^2}{λ^2-0.0293020832}+\frac{1.18925231λ^2}{λ^2-85.1780644}$$

Conditions & Spec sheet

n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 3.89e-06 1.02e-08 -1.91e-11 5.88e-07 7.57e-10 0.181
nd: 1.7725
Vd: 49.62
glass_code: 773496.424
glass_status: standard
density: 4.24 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 5.8e-06 K-1
  - temperature_range: 20 300 °C
    coefficient: 7e-06 K-1
dPgF: -0.0085
climatic_resistance: 1.0
stain_resistance: 1.0
acid_resistance: 51.3
alkali_resistance: 1.0
phosphate_resistance: 1.0

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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