LAL56 by Ohara

Obsolete Unknown Environmentally Friendly

LAL56 by Ohara is an obsolete optical glass. It transmits from 0.33 to 2.33 µm with an nd of 1.677898 and a Vd of 50.723364.

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) 1.677898
Abbe Number (Vd) 50.723364
Dispersion Formula Schott
Wavelength Range 0.334 — 2.325 µm
$$n(\lambda) = \sqrt{2.75966 - 0.0106595\,\lambda^2 + 0.0186467\,\lambda^{-2} + 0.000761275\,\lambda^{-4} - 5.35853 \times 10^{-5}\,\lambda^{-6} + 3.78209 \times 10^{-6}\,\lambda^{-8}}$$
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
LAKN8 Sumita 1.678 50.7
LACL9 Hoya 1.6779 50.551353
K-LaKn7 Sumita 1.67 51.7
LAKN7 Sumita 1.67 51.7
LACL4 Hoya 1.669603 51.65903
H-LAK67 CDGM 1.67 51.738482
LAFL1 Hoya 1.686004 49.347081
LAFN1 Sumita 1.685 49.2
LAFN23 Schott 1.689004 49.711581
C90-50 Corning 1.689009 49.625392
Similar Glasses (Ohara)
Glass Manufacturer nd Vd Compare
S-LAL56 Ohara 1.677898 50.722184
LAL58 Ohara 1.693495 50.807634
S-LAL58 Ohara 1.693495 50.810652
BSM25 Ohara 1.658441 50.861723
S-BSM25 Ohara 1.658441 50.877554
S-BAH11 Ohara 1.666718 48.325247
BAH11 Ohara 1.666718 48.317266
S-LAL20 Ohara 1.6993 51.112184
L-LAL15 Ohara 1.69304 52.9306
L-LAL13 Ohara 1.6935 53.185799
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