LAH59 by Ohara

Obsolete Unknown Environmentally Friendly

LAH59 by Ohara is an obsolete optical glass. It transmits from 0.33 to 2.33 µm with an nd of 1.816 and a Vd of 46.626446.

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) 1.816
Abbe Number (Vd) 46.626446
Dispersion Formula Schott
Wavelength Range 0.334 — 2.325 µm
$$n(\lambda) = \sqrt{3.21781 - 0.0142968\,\lambda^2 + 0.0271995\,\lambda^{-2} + 0.000790366\,\lambda^{-4} - 2.38506 \times 10^{-5}\,\lambda^{-6} + 2.00131 \times 10^{-6}\,\lambda^{-8}}$$
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
TAF5 Hoya 1.816 46.57
H-ZLAF69A CDGM 1.816 46.556066
LASFN9 Sumita 1.816 46.7
K-LaSFn9 Sumita 1.816 46.7
H-ZLAF69 CDGM 1.816 46.5493
TAF3D Hoya 1.8042 46.5
N-LASF44 Schott 1.8042 46.5
TAF3 Hoya 1.8042 46.5
K-LaSFn6 Sumita 1.804 46.6
H-ZLAF50D CDGM 1.804 46.575016
Similar Glasses (Ohara)
Glass Manufacturer nd Vd Compare
S-LAH59 Ohara 1.816 46.620561
S-LAH65V Ohara 1.803999 46.583432
LAH65 Ohara 1.804 46.575911
S-LAH65 Ohara 1.804 46.570373
S-LAH65VS Ohara 1.804 46.527532
LAH54 Ohara 1.815543 44.361146
S-LAH54 Ohara 1.815543 44.361146
LAH67 Ohara 1.794997 45.293967
S-LAH67 Ohara 1.794997 45.293967
S-LAH64 Ohara 1.788001 47.368522
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