GEO2 by Generic IR

Standard Unknown Environmentally Friendly

GEO2 by Generic IR is a standard optical glass. It transmits from 0.36 to 4.30 µm with an nd of 1.608459 and a Vd of 41.728763. It has low thermal expansion (CTE of 6.3×10⁻⁶/K).

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.36–4.3 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.36–4.3 µm
Abbe Number Calculator
Transmission vs Wavelength

No transmission data available.

Transmission Calculator
Valid wavelength range: 0.360–4.300 µm
Optical Properties
Refractive Index (nd) 1.608459
Abbe Number (Vd) 41.728763
Dispersion Formula Sellmeier
Wavelength Range 0.36 — 4.3 µm
$$n(\lambda) = \sqrt{1 + \frac{0.806866\,\lambda^2}{\lambda^2 - 0.00475722} + \frac{0.718158\,\lambda^2}{\lambda^2 - 0.0237056} + \frac{0.854168\,\lambda^2}{\lambda^2 - 140.231}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 6.3
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) 3.604
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: Handbook of Optics Vol. II

Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
BAM25 Ohara 1.60323 42.320943
BAFD5 Hoya 1.603232 42.391075
BASF5 Sumita 1.60323 42.5
K-BaSF5 Sumita 1.60323 42.5
BAFD16 Hoya 1.6 42.456745
BAFD3 Hoya 1.607171 40.359687
BAM23 Ohara 1.607167 40.26316
BASF3 Sumita 1.60717 40.2
BAF7 CDGM 1.614131 40.025731
H-BAF7 CDGM 1.61413 39.985319
Similar Glasses (Generic IR)
Glass Manufacturer nd Vd Compare
IRG7 Generic IR 1.564424 43.736647
CALCITE Generic IR 1.658643 48.541403
IRG11 Generic IR 1.680932 44.434326
KBR Generic IR 1.559967 31.977241
CSBR Generic IR 1.69706 34.108015
IRGN6 Generic IR 1.589096 56.33564
KCL Generic IR 1.490213 43.33857
IRG15 Generic IR 1.534275 55.700357
MGO Generic IR 1.737505 53.505455
SPINEL Generic IR 1.716226 60.607355
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