IRG7 by Generic IR

Standard Unknown Environmentally Friendly

IRG7 by Generic IR is a standard optical glass. It transmits from 0.36 to 3.30 µm with an nd of 1.564424 and a Vd of 43.736647. It has medium thermal expansion (CTE of 9.6×10⁻⁶/K).

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.365–3.303 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.365–3.303 µm
Abbe Number Calculator
Transmission vs Wavelength

No transmission data available.

Transmission Calculator
Valid wavelength range: 0.365–3.303 µm
Optical Properties
Refractive Index (nd) 1.564424
Abbe Number (Vd) 43.736647
Dispersion Formula Herzberger
Wavelength Range 0.365 — 3.303 µm
$$L = \frac{1}{\lambda^2 - 0.028} n(\lambda) = 1.54828 + 0.00547928\,L - 1.89907 \times 10^{-5}\,L^2 - 0.00272089\,\lambda^2 - 1.22679 \times 10^{-5}\,\lambda^4 - 9.56555 \times 10^{-7}\,\lambda^6$$
Thermal Properties
TCE -30/70°C (10-6/K) 9.6
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) 3.06
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

Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
LF8 Schott 1.564435 43.75028
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FL6 Hoya 1.567324 42.843119
E-FL6 Hoya 1.56732 42.84
PBL26 Ohara 1.567322 42.831708
S-TIL26 Ohara 1.567322 42.817076
H-QF56 CDGM 1.56732 42.810117
LF6 Sumita 1.56732 42.8
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Similar Glasses (Generic IR)
Glass Manufacturer nd Vd Compare
GEO2 Generic IR 1.608459 41.728763
KCL Generic IR 1.490213 43.33857
KBR Generic IR 1.559967 31.977241
IRG15 Generic IR 1.534275 55.700357
IRGN6 Generic IR 1.589096 56.33564
CALCITE Generic IR 1.658643 48.541403
IRG11 Generic IR 1.680932 44.434326
CSBR Generic IR 1.69706 34.108015
MGO Generic IR 1.737505 53.505455
SPINEL Generic IR 1.716226 60.607355
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