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Optical constants of SUMITA - LaSF (Lanthanum dense flint)
K-LaSFn21

Wavelength: µm
 (0.360 – 2.000)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=3.3040338-0.016019748λ^{2}+0.037645989λ^{-2}+0.0021532464λ^{-4}-0.00020498123λ^{-6}+2.7623217\text{×}10^{-05}λ^{-8}$$

Conditions & Spec sheet

n_absolute: false
λ_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 3.35e-06 1.38e-08 -2.07e-11 8.23e-07 1.31e-09 0.268
n_d: 1.85000
V_d: 32.4
glass_code: 850324
density: 3.99 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 6e-06 K-1
  - temperature_range: 20 300 °C
    coefficient: 7.6e-06 K-1
ΔP_gF: 0.0085
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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