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Optical constants of HOYA - TaFD (Dense tantalum flint)
TAFD5G

Wavelength: µm
 (0.320 – 1.550)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=3.2756799-0.014485625λ^{2}+0.030780102λ^{-2}+0.00078915515λ^{-4}-4.0810229\text{×}10^{-06}λ^{-6}+2.2273965\text{×}10^{-06}λ^{-8}$$

Conditions & Spec sheet

n_absolute: false
λ_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 2.22e-06 9.37e-09 -5.94e-11 8.37e-07 7.86e-10 0.157
n_d: 1.83481
V_d: 42.72
glass_code: 835427
glass_status: standard
density: 4.57 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 6.3e-06 K-1
  - temperature_range: 20 300 °C
    coefficient: 7.8e-06 K-1
ΔP_gF: -0.0065
climatic_resistance: 1.0
stain_resistance: 1.0
acid_resistance: 3.0

Comments

Recommended 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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