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Optical constants of SUMITA - LaK (Lanthanum crown)
K-LaKn4

Wavelength: µm
 (0.310 – 2.000)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.744955-0.013026744λ^{2}+0.016661518λ^{-2}+0.00048278001λ^{-4}-2.5815825\text{×}10^{-05}λ^{-6}+1.5241247\text{×}10^{-06}λ^{-8}$$

Conditions & Spec sheet

n_is_absolute: false
λ_is_vacuum: false
temperature: 20.0 °C
coefficients_of_thermal_dispersion: -1.88e-06 1.19e-08 -1.1e-10 3.48e-07 6.14e-10 0.223
n_d: 1.67100
V_d: 57.2
glass_code: 671572
density: 3.88 g/cm3
coefficient_of_thermal_expansion_2: 8.5e-06 K-1
ΔP_gF: -0.0038
climatic_resistance: 2.0
acid_resistance: 5.0

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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