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Optical constants of SUMITA - PFK
K-PFK80(M)

Wavelength: µm
 (0.270 – 2.000)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.212796-0.0056313014λ^{2}+0.0083136801λ^{-2}+0.00015790111λ^{-4}-1.2884506\text{×}10^{-05}λ^{-6}+8.4786533\text{×}10^{-07}λ^{-8}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: -1.91e-05 -2.54e-09 -5.06e-11 3.29e-07 5.19e-11 0.188
nd: 1.49533
Vd: 80.8
glass_code: 497815
density: 3.6 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 1.34e-05 K-1
  - temperature_range: 20 300 °C
    coefficient: 1.54e-05 K-1
dPgF: 0.0276
climatic_resistance: 1.0
acid_resistance: 3.0

References

SUMITA Zemax catalog 2017-02-02 (obtained from http://www.sumita-opt.co.jp)
See also SUMITA optical glass data book

Data

[Expressions for n]   [CSV - comma separated]   [TXT - tab separated]   [Full database record]

INFO

SUMITA Optical Glass, Inc.

SUMITA Optical Glass, Inc. is a Japanese glass manufacturer

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