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Optical constants of SCHOTT - LaSF (Lanthanum dense flint)
LASFN9

Wavelength: µm
 (0.365 – 2.5)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula [ i ]

$$n^2-1=\frac{1.97888194λ^2}{λ^2-0.0118537266}+\frac{0.320435298λ^2}{λ^2-0.052738177}+\frac{1.92900751λ^2}{λ^2-166.25654}$$

Conditions & Spec sheet

n_absolute: false
λ_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 9.44e-07 1.14e-08 -1.87e-11 9.22e-07 1.22e-09 0.255
n_d: 1.85025
V_d: 32.17
glass_code: 850322.444
glass_status: preferred
density: 4.44 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 7.4e-06 K-1
  - temperature_range: 20 300 °C
    coefficient: 8.4e-06 K-1
ΔP_gF: 0.0036
climatic_resistance: 2.0
stain_resistance: 0.0
acid_resistance: 2.0
alkali_resistance: 1.0
phosphate_resistance: 1.0

Comments

was replaced by N-LASF9

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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