RefractiveIndex.INFO Refractive index database

Shelf

Book

Page

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

Wavelength: µm
 (0.31 – 2.5)  
 

Other optical constants

n   k   logX   logY   eV

Dispersion formula [ i ]

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

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: 3.89e-06 1.02e-08 -1.91e-11 5.88e-07 7.57e-10 0.181
n_d: 1.7725
V_d: 49.62
glass_code: 773496.424
glass_status: standard
density: 4.24 g/cm3
coefficient_of_thermal_expansion_1: 5.8e-06 K-1
coefficient_of_thermal_expansion_2: 7e-06 K-1
ΔP_gF: -0.0085
climatic_resistance: 1.0
stain_resistance: 1.0
acid_resistance: 51.3
alkali_resistance: 1.0
phosphate_resistance: 1.0

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.

External links