RefractiveIndex.INFO

Refractive index database

Shelf

Book

Page

Optical constants of SUMITA - LaK (Lanthanum crown)
K-LaK8

Wavelength: µm
 (0.310 – 2.000)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.8797142-0.015009518λ^{2}+0.01933782λ^{-2}+0.00048379963λ^{-4}-1.1367908\text{×}10^{-05}λ^{-6}+7.0484275\text{×}10^{-07}λ^{-8}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 9.91e-07 1.3e-08 -2.26e-10 5.21e-07 4.99e-10 0.162
nd: 1.71300
Vd: 53.9
glass_code: 713539
density: 3.79 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 4.9e-06 K-1
  - temperature_range: 20 300 °C
    coefficient: 7.5e-06 K-1
dPgF: -0.0065
climatic_resistance: 1.0
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

External links


Glass

External links