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Optical constants of HIKARI - LaK (Lanthanum crown)
J-LAK18

Wavelength: µm
 (0.290 – 2.400)  
 

Other optical constants

n   k   logX   logY   eV

Dispersion formula

$$n^2=2.93263885-0.0142564324λ^{2}-0.000192506617λ^{4}+0.0206017616λ^{-2}+0.000293008969λ^{-4}+6.61918495\text{×}10^{-06}λ^{-6}+7.33494598\text{×}10^{-08}λ^{-8}$$

Data

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

Additional information

n_is_absolute: false
λ_is_vacuum: false
temperature: 23.0 °C
n_d: 1.729160
V_d: 54.611531
density: 4.17 g/cm3
coefficient_of_thermal_expansion_1: 5.6e-06 K-1
ΔP_gF: -0.0085
phosphate_resistance: 3.0

References

1) HIKARI optical glass catalog 2015-04-01
2) HIKARI Zemax catalog

More info - wiki

Hikari Glass Co., Ltd. is a Japanese glass maker, a subsidiary of Nikon Corp.

External links

Latest optical glass catalog