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Optical constants of SUMITA - LaSF (Lanthanum dense flint)
K-LaSFn14

Wavelength: µm
 (0.340 – 2.000)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=3.2643191-0.016265121λ^{2}+0.03202838λ^{-2}+0.0015271854λ^{-4}-4.7775544\text{×}10^{-05}λ^{-6}+5.7345907\text{×}10^{-06}λ^{-8}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 2.04e-06 1.48e-08 -2.22e-10 7.19e-07 7.99e-10 0.248
nd: 1.83400
Vd: 37.3
glass_code: 834373
density: 4.18 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 5.8e-06 K-1
  - temperature_range: 20 300 °C
    coefficient: 7.5e-06 K-1
dPgF: -0.0024
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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