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Optical constants of SUMITA - LaSF (Lanthanum dense flint)
K-LaSFn22

Wavelength: µm
 (0.350 – 2.000)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=3.477103-0.01493764λ^{2}+0.040192699λ^{-2}+0.0018404932λ^{-4}-0.00010009344λ^{-6}+1.4346776\text{×}10^{-05}λ^{-8}$$

Conditions & Spec sheet

n_is_absolute: false
λ_is_vacuum: false
temperature: 20.0 °C
coefficients_of_thermal_dispersion: 2.02e-06 1.36e-08 -2.8e-10 8.48e-07 8.18e-10 0.256
n_d: 1.89800
V_d: 34.0
glass_code: 898340
density: 4.92 g/cm3
coefficient_of_thermal_expansion_1: 5.7e-06 K-1
coefficient_of_thermal_expansion_2: 7.9e-06 K-1
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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