LAL58 by Ohara

Obsolete Unknown Environmentally Friendly
Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.3–2.4 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.3–2.4 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.330–2.400 µm
Optical Properties
Refractive Index (nd) 1.693495
Abbe Number (Vd) 50.807634
Dispersion Formula Sellmeier
Wavelength Range 0.3 — 2.4 µm
$$n(\lambda) = \sqrt{1 + \frac{1.53415\,\lambda^2}{\lambda^2 - 0.0080145} + \frac{0.274495\,\lambda^2}{\lambda^2 - 0.030237} + \frac{1.21053\,\lambda^2}{\lambda^2 - 118.744}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 7.8
TCE 100/300°C (10-6/K) 9.1
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-1.2389 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) 4.11
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance —
Stain Resistance —
Acid Resistance 53
Alkali Resistance —
Phosphate Resistance 4
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd
LACL5 Hoya 1.693503 50.787122
LAKN10 Sumita 1.692 50.6
LAFN23 Schott 1.689004 49.711581
C90-50 Corning 1.689009 49.625392
LAFL23 Hoya 1.689 49.475821
H-LAF1 CDGM 1.69362 49.193837
LAFL1 Hoya 1.686004 49.347081
LAFN1 Sumita 1.685 49.2
H-LAK71 CDGM 1.703 52.406734
LAKN8 Sumita 1.678 50.7
Similar Glasses (Ohara)
Glass Manufacturer nd Vd
S-LAL58 Ohara 1.693495 50.810652
S-LAL20 Ohara 1.6993 51.112184
S-LAL21 Ohara 1.703 52.379403
LAL56 Ohara 1.677898 50.723364
S-LAL56 Ohara 1.677898 50.722184
L-LAL15 Ohara 1.69304 52.9306
LAM59 Ohara 1.697002 48.535864
S-LAM59 Ohara 1.697002 48.516066
L-LAL13 Ohara 1.6935 53.185799
S-LAL13 Ohara 1.693501 53.205327
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