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Optical constants of SCHOTT - LaF (Lanthanum flint)
N-LAF7

Wavelength: µm
 (0.365 – 2.5)  
 

Other optical constants

n   k   logX   logY   eV

Dispersion formula [ i ]

$$n^2-1=\frac{1.74028764λ^2}{λ^2-0.010792558}+\frac{0.226710554λ^2}{λ^2-0.0538626639}+\frac{1.32525548λ^2}{λ^2-106.268665}$$

Data

[Expressions for n]   [CSV - comma separated]   [TXT - tab separated]   [Full database record]

Additional information

n_is_absolute: false
λ_is_vacuum: false
temperature: 20.0 °C
coefficients_of_thermal_dispersion: 9.21e-07 1.1e-08 -1.75e-11 7.67e-07 1.1e-09 0.264
n_d: 1.7495
V_d: 34.82
glass_code: 749348.373
glass_status: standard
density: 3.73 g/cm3
coefficient_of_thermal_expansion_1: 7.3e-06 K-1
coefficient_of_thermal_expansion_2: 8.39e-06 K-1
ΔP_gF: 0.0042
climatic_resistance: 1.0
stain_resistance: 2.0
acid_resistance: 51.3
alkali_resistance: 1.2
phosphate_resistance: 1.2

References

1) SCHOTT optical glass data sheets 2015-07-22
2) SCHOTT Zemax catalog 2015-07-22

More info - wiki

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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