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Optical constants of HOYA - TaFD (Dense tantalum flint)
TAFD25

Wavelength: µm
 (0.360 – 1.550)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=3.4905528-0.016325771λ^{2}+0.041146322λ^{-2}+0.0027169124λ^{-4}-0.00018260518λ^{-6}+2.0641862\text{×}10^{-05}λ^{-8}$$

Conditions & Spec sheet

n_absolute: false
λ_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: -2.77e-07 7.51e-09 -2.95e-11 1.02e-06 9.45e-10 0.245
n_d: 1.90366
V_d: 31.32
glass_code: 904313
glass_status: standard
density: 4.51 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 7e-06 K-1
  - temperature_range: 20 300 °C
    coefficient: 8.8e-06 K-1
ΔP_gF: 0.0028
climatic_resistance: 1.0
stain_resistance: 1.0
acid_resistance: 1.0

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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