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Optical constants of HOYA - TaFD (Dense tantalum flint)
M-TAFD305

Wavelength: µm
 (0.340 – 1.550)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=3.327184-0.01343242λ^{2}+0.033398λ^{-2}+0.001006047λ^{-4}-2.136908\text{×}10^{-05}λ^{-6}+3.972561\text{×}10^{-06}λ^{-8}$$

Conditions & Spec sheet

n_absolute: false
λ_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 5.25e-06 1.17e-08 -4.51e-11 1.25e-06 1.27e-09 0.0455
n_d: 1.85135
V_d: 40.10
glass_code: 851401
glass_status: standard
density: 5.25 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 6e-06 K-1
  - temperature_range: 20 300 °C
    coefficient: 7.8e-06 K-1
ΔP_gF: -0.0067
climatic_resistance: 1.0
stain_resistance: 2.0
acid_resistance: 3.0

Comments

Glass for molded optics lens

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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