RefractiveIndex.INFO

Refractive index database

Shelf

Book

Page

Optical constants of SUMITA - LaK (Lanthanum crown)
K-LaK12

Wavelength: µm
 (0.310 – 2.000)  
 

Derived optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.7644388-0.011785176λ^{2}+0.017957173λ^{-2}+0.00034733134λ^{-4}+3.6439617\text{×}10^{-06}λ^{-6}-3.286378\text{×}10^{-07}λ^{-8}$$

Conditions & Spec sheet

n_is_absolute: false
λ_is_vacuum: false
temperature: 20.0 °C
coefficients_of_thermal_dispersion: -3.52e-06 1.96e-08 -6.9e-11 5.11e-07 4.65e-10 0.152
n_d: 1.67790
V_d: 55.5
glass_code: 678555
density: 3.98 g/cm3
coefficient_of_thermal_expansion_1: 6.9e-06 K-1
coefficient_of_thermal_expansion_2: 8.1e-06 K-1
ΔP_gF: -0.0018
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

External links


Glass

External links