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Optical constants of SCHOTT - LaF (Lanthanum flint)
N-LAF2

Wavelength: µm
 (0.35–2.5)  
 

Complex refractive index (n+ik)[ i ]


n   k   LogX   LogY   eV

Derived optical constants

Dispersion formula [ i ]

$$n^2-1=\frac{1.80984227λ^2}{λ^2-0.0101711622}+\frac{0.15729555λ^2}{λ^2-0.0442431765}+\frac{1.0930037λ^2}{λ^2-100.687748}$$

Conditions & Spec sheet

n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: -3.64e-06 9.2e-09 -6e-12 6.43e-07 6.11e-10 0.22
nd: 1.74397
Vd: 44.85
glass_code: 744449.430
glass_status: standard
density: 4.295 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 8.06e-06 K-1
  - temperature_range: 20 300 °C
    coefficient: 9.1e-06 K-1
dPgF: -0.0027
climatic_resistance: 2.0
stain_resistance: 3.0
acid_resistance: 52.2
alkali_resistance: 1.0
phosphate_resistance: 2.2

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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