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Optical constants of SCHOTT - LaSF (Lanthanum dense flint)
N-LASF40

Wavelength: µm
 (0.365 – 2.5)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula [ i ]

$$n^2-1=\frac{1.98550331λ^2}{λ^2-0.010958331}+\frac{0.274057042λ^2}{λ^2-0.0474551603}+\frac{1.28945661λ^2}{λ^2-96.9085286}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 8.1e-06 1.25e-08 -1.73e-11 8.27e-07 1.08e-09 0.238
nd: 1.83404
Vd: 37.3
glass_code: 834373.443
glass_status: standard
density: 4.43 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 5.84e-06 K-1
  - temperature_range: 20 300 °C
    coefficient: 6.9e-06 K-1
dPgF: -0.0024
climatic_resistance: 1.0
stain_resistance: 1.0
acid_resistance: 51.2
alkali_resistance: 1.0
phosphate_resistance: 1.3

Comments

References

SCHOTT Zemax catalog 2017-01-20b (obtained from http://www.schott.com)
See also SCHOTT glass data sheets

Data

[Expressions for n]   [CSV - comma separated]   [TXT - tab separated]   [Full database record]

INFO

SCHOTT AG

SCHOTT AG is a German glass manufacturer. SCHOTT also publishes a glass catalog (SCHOTT Optical Glass Datasheets), which is a standard reference for the properties of many optical glasses.

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