LAH71 by Ohara

Obsolete Unknown Environmentally Friendly
Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.3–2.4 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.3–2.4 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.360–0.900 µm
Optical Properties
Refractive Index (nd) 1.850259
Abbe Number (Vd) 32.28594
Dispersion Formula Schott
Wavelength Range 0.3 — 2.4 µm
$$n(\lambda) = \sqrt{3.30341 - 0.0138688\,\lambda^2 + 0.0376253\,\lambda^{-2} + 0.00210677\,\lambda^{-4} - 0.000118211\,\lambda^{-6} + 1.47814 \times 10^{-5}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 7.4
TCE 100/300°C (10-6/K) 8.3
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[5.35 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) 4.81
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance —
Stain Resistance —
Acid Resistance 51
Alkali Resistance —
Phosphate Resistance 1
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd
H-ZLAF71 CDGM 1.85026 32.297288
H-ZLAF71AGT CDGM 1.85026 32.216801
TAFD9 Hoya 1.850299 32.181026
N-LASF9 Schott 1.85025 32.17
N-LASF9HT Schott 1.85025 32.17
LASFN9 Schott 1.85025 32.17
LASFN21 Sumita 1.85 32.4
K-LaSFn21 Sumita 1.85 32.4
IRG3 Generic IR 1.844836 32.330322
K-GIR79 Sumita 1.8592 33.0
Similar Glasses (Ohara)
Glass Manufacturer nd Vd
S-LAH71 Ohara 1.850259 32.27012
S-NBH57 Ohara 1.850249 30.046429
LAH75 Ohara 1.873996 35.258591
S-LAH75 Ohara 1.873996 35.258594
L-LAH94 Ohara 1.860999 37.097767
LAH80 Ohara 1.885 30.163795
S-LAH60 Ohara 1.834 37.160487
LAH60 Ohara 1.834 37.166863
S-LAH60MQ Ohara 1.833999 37.172099
S-LAH60V Ohara 1.833999 37.206855
Compare Glasses
    Compare Selected