RefractiveIndex.INFO

Refractive index database


Shelf

Book

Page

Optix.eXpert

Optix.eXpert is our new website that aims at connecting optical professionals with employers looking to outsource optics related work. Sign up and post a listing now to start offering a service.

Optical constants of SCHOTT - IRG
IRG 24

Wavelength: µm
 (0.8 – 15.5)  
 

Complex refractive index (n+ik)[ i ]


n   k   LogX   LogY   eV

Derived optical constants

Dispersion formula [ i ]

$$n^2-1=2.8965+\frac{2.9567λ^2}{λ^2-0.1620}+\frac{0.9461λ^2}{λ^2-1939.1}$$

Conditions & Spec sheet

n_absolute: false
wavelength_vacuum: false
temperature: 20.0 °C
thermal_dispersion:
  - type: "Schott formula"
    coefficients: 1.80e-05 0 0 2.10e-07 0 1.67e-03
density: 4.41 g/cm3
thermal_expansion:
  - temperature_range: 20 100 °C
    coefficient: 20.0e-06 K-1
specific_heat: 0.37 J/(g·K)
thermal_conductivity:
  - value: 0.18 W/(m·K)
transition_temperature: 225 °C
Knoop_hardness: 1.12 GPa
fracture_toughness: 0.347 MPa·m1/2
shear_modulus: 8.5 GPa
Youngs_modulus: 20.5 GPa

References

SCHOTT Infrared Chalcogenide Glasses - IRG 24 Product flyer (Version April 2017)

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

External Links


Glass

External links