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Optical constants of SUMITA - LaSF (Lanthanum dense flint)
K-LaSFn23

Wavelength: µm
 (0.350 – 2.000)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=3.527437-0.014640706λ^{2}+0.040393831λ^{-2}+0.0015495078λ^{-4}-4.5667249\text{×}10^{-05}λ^{-6}+9.0971269\text{×}10^{-06}λ^{-8}$$

Conditions & Spec sheet

n_is_absolute: false
λ_is_vacuum: false
temperature: 20.0 °C
coefficients_of_thermal_dispersion: 1.83e-08 1.49e-08 -2.69e-10 8.28e-07 7.87e-10 0.248
n_d: 1.91100
V_d: 35.2
glass_code: 911352
density: 4.9 g/cm3
coefficient_of_thermal_expansion_1: 6.9e-06 K-1
coefficient_of_thermal_expansion_2: 8.8e-06 K-1
ΔP_gF: -0.0019
climatic_resistance: 1.0
acid_resistance: 1.0

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]

INFO

SUMITA Optical Glass, Inc.

SUMITA Optical Glass, Inc. is a Japanese glass manufacturer

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