LAM51 by Ohara

Obsolete Unknown Environmentally Friendly
Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.365–0.9 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.365–0.9 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.390–0.900 µm
Optical Properties
Refractive Index (nd) 1.699998
Abbe Number (Vd) 48.078869
Dispersion Formula Schott
Wavelength Range 0.365 — 0.9 µm
$$n(\lambda) = \sqrt{2.83067 - 0.0125419\,\lambda^2 + 0.0192817\,\lambda^{-2} + 0.00113639\,\lambda^{-4} - 8.83841 \times 10^{-5}\,\lambda^{-6} + 5.82287 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 7.8
TCE 100/300°C (10-6/K) 8.8
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[4.8618 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) 4.09
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
H-LAF51 CDGM 1.7 48.079839
K-LaFn3 Sumita 1.7 48.0
LAFN3 Sumita 1.7 48.0
LAFL3 Hoya 1.700301 47.836538
LAFN2 Sumita 1.697 48.5
LAFL2 Hoya 1.697 48.514006
H-LAF1 CDGM 1.69362 49.193837
LAFL23 Hoya 1.689 49.475821
C90-50 Corning 1.689009 49.625392
LAFN23 Schott 1.689004 49.711581
Similar Glasses (Ohara)
Glass Manufacturer nd Vd
S-LAM51 Ohara 1.699998 48.080479
S-LAM59 Ohara 1.697002 48.516066
LAM59 Ohara 1.697002 48.535864
LAM3 Ohara 1.717004 47.942632
S-LAM3 Ohara 1.717004 47.927969
LAL58 Ohara 1.693495 50.807634
S-LAL58 Ohara 1.693495 50.810652
S-LAL20 Ohara 1.6993 51.112184
LAM61 Ohara 1.720002 46.035166
S-LAM61 Ohara 1.720002 46.024571
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