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Optical constants of SUMITA - LaF (Lanthanum flint)
K-LaF2

Wavelength: µm
 (0.340 – 2.000)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.969235-0.01236657λ^{2}+0.024178838λ^{-2}+0.00087063153λ^{-4}-4.4196612\text{×}10^{-05}λ^{-6}+4.4742987\text{×}10^{-06}λ^{-8}$$

Conditions & Spec sheet

n_is_absolute: false
λ_is_vacuum: false
temperature: 20.0 °C
coefficients_of_thermal_dispersion: -1.89e-06 1.65e-08 -4.35e-11 6.29e-07 6.76e-10 0.223
n_d: 1.74400
V_d: 44.9
glass_code: 744449
density: 4.01 g/cm3
coefficient_of_thermal_expansion_1: 7.3e-06 K-1
coefficient_of_thermal_expansion_2: 8.6e-06 K-1
ΔP_gF: -0.0038
climatic_resistance: 1.0
acid_resistance: 4.0

References

SUMITA Zemax catalog 2017-02-02 (obtained from http://www.sumita-opt.co.jp)
See also SUMITA optical glass data book

Data

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

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SUMITA Optical Glass, Inc.

SUMITA Optical Glass, Inc. is a Japanese glass manufacturer

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