Optical constants of OHARA - LAL (Lanthanum, low-index)
S-LAL18

Wavelength: µm

(0.28 – 2.4)

Derived optical constants

Dispersion formula [ i ]

$$n^2-1=\frac{1.50276318λ^2}{λ^2-0.0145462356}+\frac{0.430224497λ^2}{λ^2+0.00332784153}+\frac{1.3472606λ^2}{λ^2-93.3508342}$$

Comments

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Data

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

Additional information

n_is_absolute: false λ_is_vacuum: false temperature: 25.0 °C coefficients_of_thermal_dispersion: 2.46e-06 1.15e-08 -3.23e-12 6.57e-07 8.65e-10 0.0 n_d: 1.729157 V_d: 54.680013 glass_code: 729547 glass_status: standard density: 4.18 g/cm³ coefficient_of_thermal_expansion_1: 5.9e-06 K^-1 coefficient_of_thermal_expansion_2: 6.9e-06 K^-1 ΔP_gF: -0.0086 climatic_resistance: 1.0 acid_resistance: 51.2 phosphate_resistance: 2.0

References

1) OHARA optical glass datasheets 2015-12-01
2) OHARA Zemax catalog 2015-12-01

Reflection calculator

Angle of incidence (0~90°):
Direction: in out

Reflectance (at µm)[ i ]

R_S = (S-polarized)
R_P = (P-polarized)
R = (non-polarized, (R_S+R_P)/2 )

Reflection phase[ i ]

ɸ = °
ɸ_S = °
ɸ_P = °

Brewster's angle[ i ]

θ_B = °

Critical angle[ i ] [ i ]

θ_C = °

More info - wiki

Ohara Group is an international group of companies with headquarters in Japan and subsidiaries in Japan (Ohara, Inc.), United States (Ohara Corporation), and Germany (Ohara, GmbH). Ohara manufactures optical and electronic products and also offers measurement services, in particular measurement of refractive indices of solids and liquids.

Optical constants of OHARA - LAL (Lanthanum, low-index)
S-LAL18

Refractive index[ i ]

Extinction coefficient[ i ]

Derived optical constants

Relative permittivity (dielectric constants)[ i ] [ i ]

Absorption coefficient[ i ] [ i ]

Abbe number[ i ]

Chromatic dispersion[ i ]

Group index[ i ] [ i ]

Group velocity dispersion[ i ] [ i ] [ i ]

Dispersion formula [ i ]

Comments

Data

Additional information

References

Optical transmission calculator

Transmittance (at µm)[ i ]

Reflection calculator

Reflectance (at µm)[ i ]

Reflection phase[ i ]

Brewster's angle[ i ]

Critical angle[ i ] [ i ]

More info - wiki

External links

Optical constants of OHARA - LAL (Lanthanum, low-index)S-LAL18

Refractive index[ i ]

Extinction coefficient[ i ]

Derived optical constants

Relative permittivity (dielectric constants)[ i ] [ i ]

Absorption coefficient[ i ] [ i ]

Abbe number[ i ]

Chromatic dispersion[ i ]

Group index[ i ] [ i ]

Group velocity dispersion[ i ] [ i ] [ i ]

Dispersion formula [ i ]

Comments

Data

Additional information

References

Optical transmission calculator

Transmittance (at µm)[ i ]

Reflection calculator

Reflectance (at µm)[ i ]

Reflection phase[ i ]

Brewster's angle[ i ]

Critical angle[ i ] [ i ]

More info - wiki

External links

Optical constants of OHARA - LAL (Lanthanum, low-index)
S-LAL18