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Optical constants of SCHOTT - IRG
IRG 23

Wavelength: µm
 (1 – 12)  
 

Derived optical constants

logX   logY   eV

Dispersion formula [ i ]

$$n^2-1=3.74971+\frac{3.07065λ^2}{λ^2-0.498392^2}+\frac{0.953206λ^2}{λ^2-40.7557^2}$$

Comments

20 °C

References

SCHOTT Infrared Chalcogenide Glasses - IRG 23 Product flyer (Version May 2013)

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
As40S60 AMTIR-6
(*) Out of production

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