RefractiveIndex.INFO

Refractive index database


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Optical constants of VITRON - IG
IG 2

Wavelength: µm
 (1 – 14.0)  
 

Complex refractive index (n+ik)[ i ]


n   k   LogX   LogY   eV

Derived optical constants

Dispersion formula [ i ]

$$n^2-1=2.341388+\frac{2.962098λ^2}{λ^2-0.360017^2}+\frac{0.831035λ^2}{λ^2-35.023342^2}$$

Comments

Room temperature. Refractive index is relative to air at standard conditions; Wavelength in dispersion formula is as measured in air and expressed in micrometers.

References

1) VITRON datasheet IG-2 June 2014
2) Dr. Rolf Henkel (VITRON Spezialwerkstoffe GmbH) - private communications

Data

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

INFO

Infrared glass

Often, calcogenide glasses are used in the optical systems operating at infrared wavelengths ~1-14 µm (for instance, optical systems for thermal imaging and night vision)

Infrared glass types/brands from different makers

  • AMTIR (an acronym for "Amorphous Material Transmitting Infrared Radiation"): Amorphous Materials Inc. (AMI)
  • IG: VITRON
  • IRG: SCHOTT
  • BD: LightPath
  • OPTIR: Rochester Precision Optics (RPO)

Cross-reference

Composition AMI VITRON SCHOTT LightPath RPO
Ge33As12Se55 AMTIR-1 IG 2 IRG 22 OPTIR-1*
Ge30Sb13Se32Te25 IG 3 IRG 23*
Ge10As40Se50 IG 4 IRG 24
Ge28Sb12Se60 AMTIR-3* IG 5 IRG 25 BD-2 OPTIR-3*
As40Se60 AMTIR-2 IG 6 IRG 26 BD6
As40S60 AMTIR-6 IRG 27
(*) Out of production

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