ALON by Generic IR

Standard Unknown Environmentally Friendly

ALON by Generic IR is a standard optical glass. It transmits from 0.40 to 2.30 µm with an nd of 1.788917 and a Vd of 58.204971. It has low thermal expansion (CTE of 5.66×10⁻⁶/K).

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.4–2.3 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.4–2.3 µm
Abbe Number Calculator
Transmission vs Wavelength

No transmission data available.

Transmission Calculator
Valid wavelength range: 0.400–2.300 µm
Optical Properties
Refractive Index (nd) 1.788917
Abbe Number (Vd) 58.204971
Dispersion Formula Sellmeier
Wavelength Range 0.4 — 2.3 µm
$$n(\lambda) = \sqrt{1 + \frac{2.1375\,\lambda^2}{\lambda^2 - 0.0105186} + \frac{4.582\,\lambda^2}{\lambda^2 - 356.001} + \frac{0\,\lambda^2}{\lambda^2 - 0}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 5.66
TCE 100/300°C (10-6/K) —
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[1.637 \times 10^{-5} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.713
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
K-LaSKn1 Sumita 1.755 52.4
LASKN1 Sumita 1.755 52.4
YGH51 Ohara 1.754998 52.326713
H-LAK53B CDGM 1.755 52.322058
S-YGH51 Ohara 1.754998 52.321434
H-LAK53A CDGM 1.755 52.320574
TAC6 Hoya 1.755 52.32
TAC6L Hoya 1.755 52.32
LAK33 Schott 1.753977 52.430467
N-LAK33 Schott 1.753977 52.430467
Similar Glasses (Generic IR)
Glass Manufacturer nd Vd Compare
MGO Generic IR 1.737505 53.505455
SPINEL Generic IR 1.716226 60.607355
SAPPHIRE Generic IR 1.768234 72.237215
IRG11 Generic IR 1.680932 44.434326
CALCITE Generic IR 1.658643 48.541403
IRG3 Generic IR 1.844836 32.330322
CSBR Generic IR 1.69706 34.108015
IRGN6 Generic IR 1.589096 56.33564
GEO2 Generic IR 1.608459 41.728763
PBF2 Generic IR 1.766591 28.390315
Compare Glasses
    Compare Selected