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Optical constants of SUMITA - LaSK (Lanthanum dense crown)
K-LaSKn1

Wavelength: µm
 (0.280 – 2.000)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=3.0176028-0.01512239λ^{2}+0.021959514λ^{-2}+0.00052144528λ^{-4}-1.8693935\text{×}10^{-05}λ^{-6}+1.6369365\text{×}10^{-06}λ^{-8}$$

Conditions & Spec sheet

n_is_absolute: false
λ_is_vacuum: false
temperature: 20.0 °C
coefficients_of_thermal_dispersion: 9.54e-07 1.19e-08 -2.27e-10 5.55e-07 9.65e-10 0.153
n_d: 1.75500
V_d: 52.4
glass_code: 755524
density: 4.51 g/cm3
coefficient_of_thermal_expansion_1: 5.7e-06 K-1
coefficient_of_thermal_expansion_2: 7e-06 K-1
ΔP_gF: -0.009
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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