LAH51 by Ohara

Obsolete Unknown Environmentally Friendly

LAH51 by Ohara is an obsolete optical glass. It transmits from 0.33 to 2.33 µm with an nd of 1.785896 and a Vd of 44.186159.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.334–2.325 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.334–2.325 µm
Abbe Number Calculator
Transmission vs Wavelength

No transmission data available.

Transmission Calculator
Valid wavelength range: 0.334–2.325 µm
Optical Properties
Refractive Index (nd) 1.785896
Abbe Number (Vd) 44.186159
Dispersion Formula Schott
Wavelength Range 0.334 — 2.325 µm
$$n(\lambda) = \sqrt{3.11066 - 0.0144627\,\lambda^2 + 0.0264577\,\lambda^{-2} + 0.000918778\,\lambda^{-4} - 3.39516 \times 10^{-5}\,\lambda^{-6} + 3.32578 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) —
TCE 100/300°C (10-6/K) —
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[0 + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) —
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 —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
H-LAF52 CDGM 1.7859 44.187159
N-LAF33 Schott 1.78582 44.05
NBFD11 Hoya 1.7859 43.94
LAFN10 Schott 1.784432 43.950523
K-LaSFn4 Sumita 1.785 43.7
LASFN4 Sumita 1.785 43.7
NBFD1 Hoya 1.789004 42.757634
LASFN19 Sumita 1.795 45.2
TAF2 Hoya 1.7945 45.39
D96-43 Corning 1.796195 43.217783
Similar Glasses (Ohara)
Glass Manufacturer nd Vd Compare
S-LAH51 Ohara 1.785896 44.202637
LAH67 Ohara 1.794997 45.293967
S-LAH67 Ohara 1.794997 45.293967
LAH52 Ohara 1.799516 42.241337
S-LAH52Q Ohara 1.79952 42.239506
S-LAH52 Ohara 1.799516 42.225007
S-LAH64 Ohara 1.788001 47.368522
LAH64 Ohara 1.788001 47.385275
S-LAH65VS Ohara 1.804 46.527532
S-LAH65 Ohara 1.804 46.570373
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