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Optical constants of LASF9
N-LASF9 (SCHOTT)

Wavelength: µm
 (0.37 – 2.5)  
 

Other optical constants

n   k   logX   logY   eV

Dispersion formula [ i ]

$$n^2-1=\frac{2.00029547λ^2}{λ^2-0.0121426017}+\frac{0.298926886λ^2}{λ^2-0.0538736236}+\frac{1.80691843λ^2}{λ^2-156.530829}$$

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: 1.05e-06 1.02e-08 -2.38e-11 9.19e-07 1.18e-09 0.257
n_d: 1.85025
V_d: 32.17
glass_code: 850322.441
glass_status: standard
density: 4.41 g/cm3
coefficient_of_thermal_expansion_1: 7.37e-06 K-1
coefficient_of_thermal_expansion_2: 8.38e-06 K-1
ΔP_gF: 0.0037
climatic_resistance: 1.0
stain_resistance: 0.0
acid_resistance: 2.0
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

N-LASF9 is a lanthanum dense flint optical glass produced by Schott AG