LAL61 by Ohara

Obsolete Unknown Environmentally Friendly

LAL61 by Ohara is an obsolete optical glass. It transmits from 0.33 to 2.33 µm with an nd of 1.740999 and a Vd of 52.648747.

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) 1.740999
Abbe Number (Vd) 52.648747
Dispersion Formula Schott
Wavelength Range 0.334 — 2.325 µm
$$n(\lambda) = \sqrt{2.97068 - 0.0150587\,\lambda^2 + 0.0214905\,\lambda^{-2} + 0.000385662\,\lambda^{-4} + 4.12526 \times 10^{-6}\,\lambda^{-6} + 1.09129 \times 10^{-7}\,\lambda^{-8}}$$
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-LAK61 CDGM 1.740999 52.676196
TAC2 Hoya 1.741 52.61
LAKN14 Sumita 1.741 52.7
K-LaKn14 Sumita 1.741 52.7
MGO Generic IR 1.737505 53.505455
LAK16A Schott 1.733501 51.779678
H-LAK54 CDGM 1.734 51.485829
D34-51 Corning 1.733513 51.387663
LAKN12 Sumita 1.7335 51.2
N-LAK33 Schott 1.753977 52.430467
Similar Glasses (Ohara)
Glass Manufacturer nd Vd Compare
S-LAL61 Ohara 1.740999 52.636502
S-LAL61Q Ohara 1.740999 52.60195
LAL59 Ohara 1.733997 51.488026
S-LAL59 Ohara 1.733997 51.47057
YGH51 Ohara 1.754998 52.326713
S-YGH51 Ohara 1.754998 52.321434
S-LAH97 Ohara 1.755 52.318818
S-LAL19 Ohara 1.72916 54.095223
S-LAL60 Ohara 1.725999 53.565698
LAL60 Ohara 1.725999 53.565698
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