S-LAM58 by Ohara

Special Unknown Environmentally Friendly

S-LAM58 by Ohara is a special optical glass. It transmits from 0.35 to 2.40 µm with an nd of 1.72 and a Vd of 41.978463. It has medium thermal expansion (CTE of 6.6×10⁻⁶/K) and good chemical resistance.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.365015–2.32542 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.365015–2.32542 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.350–2.400 µm
Optical Properties
Refractive Index (nd) 1.72
Abbe Number (Vd) 41.978463
Dispersion Formula Sellmeier
Wavelength Range 0.365015 — 2.32542 µm
$$n(\lambda) = \sqrt{1 + \frac{1.70985\,\lambda^2}{\lambda^2 - 0.0100852} + \frac{0.173343\,\lambda^2}{\lambda^2 - 0.0470891} + \frac{1.64834\,\lambda^2}{\lambda^2 - 157.469}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 6.6
TCE 100/300°C (10-6/K) —
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[2.9 \times 10^{-6} + 2(1.29 \times 10^{-8})\,\Delta T + 3(-3.62 \times 10^{-11})\,\Delta T^2 + \frac{6.72 \times 10^{-7} + 2(7.76 \times 10^{-10})\,\Delta T}{\lambda - 0.243}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) 4.0
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 1
Stain Resistance —
Acid Resistance 3
Alkali Resistance —
Phosphate Resistance 1
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
LAFL6 Hoya 1.72 42.016239
LAFN10 Sumita 1.72016 42.1
LAFL4 Hoya 1.712704 43.295113
H-LAF62 CDGM 1.72 43.680739
LAFN4 Sumita 1.72 43.7
LAFL5 Hoya 1.719998 43.903303
D-LAF79-25 CDGM 1.72986 40.497566
D-LAF79 CDGM 1.73077 40.508021
MP-LAF81 Hoya 1.73077 40.5
M-LAF81 Hoya 1.73077 40.5
Similar Glasses (Ohara)
Glass Manufacturer nd Vd Compare
LAM58 Ohara 1.72 41.989859
S-LAM52 Ohara 1.72 43.689812
LAM52 Ohara 1.72 43.705625
L-LAM69 Ohara 1.73077 40.508156
BAH27 Ohara 1.701536 41.242277
S-BAH27 Ohara 1.701536 41.23944
BAH77 Ohara 1.701539 41.21001
BAH71 Ohara 1.701998 40.097173
S-BAH54 Ohara 1.695 42.167111
BAH54 Ohara 1.695 42.167111
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