LAL12 by Ohara

Obsolete Unknown Environmentally Friendly

LAL12 by Ohara is an obsolete optical glass. It transmits from 0.33 to 2.33 µm with an nd of 1.6779 and a Vd of 55.337587.

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) 1.6779
Abbe Number (Vd) 55.337587
Dispersion Formula Schott
Wavelength Range 0.334 — 2.325 µm
$$n(\lambda) = \sqrt{2.75895 - 0.00877877\,\lambda^2 + 0.0211731\,\lambda^{-2} - 0.000472624\,\lambda^{-4} + 9.68707 \times 10^{-5}\,\lambda^{-6} - 4.05765 \times 10^{-6}\,\lambda^{-8}}$$
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
N-LAK12 Schott 1.6779 55.2
LAKN12 Schott 1.6779 55.199566
K-LaK12 Sumita 1.6779 55.5
LAK12 Sumita 1.6779 55.5
H-LAK5A CDGM 1.6779 55.51497
C78-56 Corning 1.678004 55.519168
LAC12 Hoya 1.6779 55.52
LAKL12 Schott 1.6779 54.92
D-LAK5 CDGM 1.6779 54.889665
D-LAK5-25 CDGM 1.67686 54.805426
Similar Glasses (Ohara)
Glass Manufacturer nd Vd Compare
S-LAL12 Ohara 1.6779 55.341195
S-LAL12Q Ohara 1.6779 55.346888
L-LAL12 Ohara 1.6779 54.88744
LAL9 Ohara 1.691002 54.84322
S-LAL9 Ohara 1.691002 54.822578
S-LAL52 Ohara 1.669999 57.327972
LAL52 Ohara 1.669999 57.327972
LAL14 Ohara 1.696796 55.528037
S-LAL14 Ohara 1.696797 55.532241
LAL13 Ohara 1.693501 53.231566
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