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Optical constants of SCHOTT - LaF (Lanthanum flint)
N-LAF33

Wavelength: µm
 (0.32 – 2.5)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula [ i ]

$$n^2-1=\frac{1.79653417λ^2}{λ^2-0.00927313493}+\frac{0.311577903λ^2}{λ^2-0.0358201181}+\frac{1.15981863λ^2}{λ^2-87.3448712}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 8.17e-06 1.24e-08 -1.65e-11 7.11e-07 8.59e-10 0.21
nd: 1.78582
Vd: 44.05
glass_code: 786441.436
glass_status: standard
density: 4.36 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 5.6e-06 K-1
  - temperature_range: 20 300 °C
    coefficient: 6.7e-06 K-1
dPgF: -0.0071
climatic_resistance: 1.0
stain_resistance: 2.0
acid_resistance: 52.2
alkali_resistance: 1.0
phosphate_resistance: 3.0

Comments

suitable for precision molding

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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