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Optical constants of HOYA - TaF (Tantalum flint)
TAF4

Wavelength: µm
 (0.310–1.550)  
 

Complex refractive index (n+ik)[ i ]


n   k   LogX   LogY   eV

Derived optical constants

Dispersion formula

$$n^2=3.1212281-0.014119909λ^{2}+0.026520622λ^{-2}+0.00040415763λ^{-4}+1.4260634\text{×}10^{-05}λ^{-6}+3.164256\text{×}10^{-07}λ^{-8}$$

Conditions & Spec sheet

n_is_absolute: false
wavelength_is_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 5.51099e-06 0.0 0.0 0.0 0.0 0.0
nd: 1.78800
Vd: 47.49
glass_code: 788475
glass_status: special
density: 4.54 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 5.8e-06 K-1
  - temperature_range: 20 300 °C
    coefficient: 7.4e-06 K-1
dPgF: -0.009
climatic_resistance: 1.0
stain_resistance: 2.0
acid_resistance: 3.0

Comments

Not in a position to accept new order because of discontinuation.

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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