IRG2 by Generic IR

Standard Unknown Environmentally Friendly

IRG2 by Generic IR is a standard optical glass. It transmits from 0.36 to 4.59 µm with an nd of 1.891717 and a Vd of 29.896648. It has medium thermal expansion (CTE of 8.8×10⁻⁶/K).

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.365–4.586 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.365–4.586 µm
Abbe Number Calculator
Transmission vs Wavelength

No transmission data available.

Transmission Calculator
Valid wavelength range: 0.365–4.586 µm
Optical Properties
Refractive Index (nd) 1.891717
Abbe Number (Vd) 29.896648
Dispersion Formula Herzberger
Wavelength Range 0.365 — 4.586 µm
$$L = \frac{1}{\lambda^2 - 0.028} n(\lambda) = 1.85363 + 0.0121653\,L + 6.64999 \times 10^{-5}\,L^2 - 0.0026676\,\lambda^2 - 1.29307 \times 10^{-7}\,\lambda^4 - 2.88757 \times 10^{-7}\,\lambda^6$$
Thermal Properties
TCE -30/70°C (10-6/K) 8.8
TCE 100/300°C (10-6/K) —
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[0 + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 5.0
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance —
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Notes

source: Schott Spec Sheet

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Similar Glasses (Generic IR)
Glass Manufacturer nd Vd Compare
IRG3 Generic IR 1.844836 32.330322
PBF2 Generic IR 1.766591 28.390315
CSBR Generic IR 1.69706 34.108015
MGO Generic IR 1.737505 53.505455
ALON Generic IR 1.788917 58.204971
IRG11 Generic IR 1.680932 44.434326
CALCITE Generic IR 1.658643 48.541403
SPINEL Generic IR 1.716226 60.607355
GEO2 Generic IR 1.608459 41.728763
ALN Generic IR 2.154291 50.733102
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