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Optical constants of HOYA - TaF (Tantalum flint)
TAF2

Wavelength: µm
 (0.310 – 1.550)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=3.1415564-0.014370304λ^{2}+0.026483051λ^{-2}+0.00095642714λ^{-4}-5.9411087\text{×}10^{-05}λ^{-6}+4.703953\text{×}10^{-06}λ^{-8}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 5.63294e-06 0.0 0.0 0.0 0.0 0.0
nd: 1.79450
Vd: 45.39
glass_code: 795454
glass_status: special
density: 4.35 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 6e-06 K-1
  - temperature_range: 20 300 °C
    coefficient: 7.4e-06 K-1
dPgF: -0.0093
climatic_resistance: 1.0
stain_resistance: 1.0
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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