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Refractive index database


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Optical constants of HIKARI - LaK (Lanthanum crown)
E-LAK10

Wavelength: µm
 (0.300 – 0.7)  
 

Complex refractive index (n+ik)[ i ]


n   k   LogX   LogY   eV

Derived optical constants

Dispersion formula

$$n^2=2.89528358-0.0117686807λ^{2}+0.0222295765λ^{-2}+0.000269351264λ^{-4}+2.23005932\text{×}10^{-05}λ^{-6}-4.3546434\text{×}10^{-07}λ^{-8}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 23.0 °C
nd: 1.719995
Vd: 50.228454
glass_code: 720502
glass_status: preferred
density: 3.74 g/cm3
thermal_expansion:
  - temperature_range: -30 70 °C
    coefficient: 8.2e-06 K-1
dPgF: -0.0065

References

NIKON Zemax catalog 2017-11 (obtained from http://www.nikon.com)
See also HIKARI glass data sheets

Data

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

INFO

Hikari Glass Co., Ltd.

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

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