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Optical constants of SUMITA - LaSF (Lanthanum dense flint)
K-LaSFn9

Wavelength: µm
 (0.310 – 2.000)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=3.2184433-0.014906369λ^{2}+0.02692619λ^{-2}+0.00087409748λ^{-4}-4.0331281\text{×}10^{-05}λ^{-6}+3.1677745\text{×}10^{-06}λ^{-8}$$

Conditions & Spec sheet

n_is_absolute: false
λ_is_vacuum: false
temperature: 20.0 °C
coefficients_of_thermal_dispersion: 1.34e-06 2.13e-08 -1.52e-10 5.8e-07 6.95e-10 0.204
n_d: 1.81600
V_d: 46.7
glass_code: 816467
density: 4.96 g/cm3
coefficient_of_thermal_expansion_1: 6.3e-06 K-1
coefficient_of_thermal_expansion_2: 7.6e-06 K-1
ΔP_gF: -0.0086
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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