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Optical constants of SUMITA - LaSF (Lanthanum dense flint)
K-LaSFn4

Wavelength: µm
 (0.310 – 2.000)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=3.1049984-0.013342479λ^{2}+0.027506526λ^{-2}+0.00075451621λ^{-4}-1.6565687\text{×}10^{-05}λ^{-6}+2.780481\text{×}10^{-06}λ^{-8}$$

Conditions & Spec sheet

n_is_absolute: false
λ_is_vacuum: false
temperature: 20.0 °C
coefficients_of_thermal_dispersion: -6.24e-07 1.69e-08 -1.42e-10 6.93e-07 1.19e-09 0.208
n_d: 1.78500
V_d: 43.7
glass_code: 785437
density: 4.12 g/cm3
coefficient_of_thermal_expansion_1: 6.9e-06 K-1
coefficient_of_thermal_expansion_2: 8.3e-06 K-1
ΔP_gF: -0.0078
climatic_resistance: 1.0
acid_resistance: 3.0

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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