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Optical constants of HOYA - NbF (Niobium flint)
NBF1

Wavelength: µm
 (0.300 – 1.550)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.9753491-0.01461347λ^{2}+0.021096383λ^{-2}+0.001198038λ^{-4}-0.00011887388λ^{-6}+7.344435\text{×}10^{-06}λ^{-8}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 1.08987e-05 0.0 0.0 0.0 0.0 0.0
nd: 1.74330
Vd: 49.22
glass_code: 743492
density: 4.17 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 5.3e-06 K-1
  - temperature_range: 20 300 °C
    coefficient: 6.8e-06 K-1
dPgF: -0.0103
climatic_resistance: 1.0
stain_resistance: 4.0
acid_resistance: 4.0

Comments

General glass Type

References

HOYA Zemax catalog 2017-04-01 (obtained from http://www.hoya-opticalworld.com)

Data

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

INFO

HOYA Corporation

Hoya Corporation is a Japanese company manufacturing optical products.

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