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Optical constants of SUMITA - LaSF (Lanthanum dense flint)
K-LaSFn7

Wavelength: µm
 (0.300 – 2.000)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=3.0728806-0.014815338λ^{2}+0.024064142λ^{-2}+0.00049961497λ^{-4}+1.2852807\text{×}10^{-06}λ^{-6}+5.2262074\text{×}10^{-07}λ^{-8}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 2.19e-06 1.73e-08 -1.56e-10 5.97e-07 3.56e-10 0.161
nd: 1.77250
Vd: 49.6
glass_code: 773496
density: 4.44 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 5.7e-06 K-1
  - temperature_range: 20 300 °C
    coefficient: 7.2e-06 K-1
dPgF: -0.0077
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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