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Optical constants of SUMITA - SK (Dense crown)
K-SK4

Wavelength: µm
 (0.280 – 2.000)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.5587726-0.0098095616λ^{2}+0.014840563λ^{-2}+0.0003193166λ^{-4}-1.016436\text{×}10^{-05}λ^{-6}+6.6518794\text{×}10^{-07}λ^{-8}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 4.04e-07 1.86e-08 -3.68e-10 4.13e-07 4.69e-10 0.197
nd: 1.61272
Vd: 58.6
glass_code: 613586
density: 3.58 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 6.1e-06 K-1
  - temperature_range: 20 300 °C
    coefficient: 7.6e-06 K-1
dPgF: -0.0006
climatic_resistance: 3.0
acid_resistance: 4.0

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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