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Optical constants of SUMITA - LaF (Lanthanum flint)
K-LaFn3

Wavelength: µm
 (0.340 – 2.000)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.827081-0.010220727λ^{2}+0.021224097λ^{-2}+0.0006653956λ^{-4}-3.3316539\text{×}10^{-05}λ^{-6}+3.16429\text{×}10^{-06}λ^{-8}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: -3.22e-06 1.12e-08 -3.14e-10 6.46e-07 6.47e-10 0.204
nd: 1.70000
Vd: 48.0
glass_code: 700480
density: 4.02 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 7.3e-06 K-1
  - temperature_range: 20 300 °C
    coefficient: 9.6e-06 K-1
dPgF: -0.0034
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]

INFO

SUMITA Optical Glass, Inc.

SUMITA Optical Glass, Inc. is a Japanese glass manufacturer

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