S-LAH54 by Ohara

Obsolete Unknown Environmentally Friendly

S-LAH54 by Ohara is an obsolete optical glass. It transmits from 0.32 to 0.90 µm with an nd of 1.815543 and a Vd of 44.361146. It has low thermal expansion (CTE of 5.9×10⁻⁶/K) and average chemical resistance.

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: 0.320–0.900 µm
Optical Properties
Refractive Index (nd) 1.815543
Abbe Number (Vd) 44.361146
Dispersion Formula Schott
Wavelength Range 0.3 — 2.4 µm
$$n(\lambda) = \sqrt{3.2127 - 0.0153514\,\lambda^2 + 0.0284404\,\lambda^{-2} + 0.000791802\,\lambda^{-4} - 1.70328 \times 10^{-5}\,\lambda^{-6} + 2.62191 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 5.9
TCE 100/300°C (10-6/K) 7.1
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[4.815 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) 4.54
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance —
Stain Resistance —
Acid Resistance 4
Alkali Resistance —
Phosphate Resistance 1
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
K-LaSFn10 Sumita 1.8155 44.4
LASFN10 Sumita 1.8155 44.4
TAFD10 Hoya 1.815502 44.5379
K-VC100 Sumita 1.804 43.6
M-TAFD51 Hoya 1.8208 42.71
MC-TAFD51-50 Hoya 1.8213 42.72
MP-TAFD51-50 Hoya 1.8213 42.72
D-ZLAF61-25 CDGM 1.82131 42.674895
NBFD14 Hoya 1.801699 44.321602
H-ZLAF1 CDGM 1.80166 44.263459
Similar Glasses (Ohara)
Glass Manufacturer nd Vd Compare
LAH54 Ohara 1.815543 44.361146
S-LAH59 Ohara 1.816 46.620561
LAH59 Ohara 1.816 46.626446
S-LAH65VS Ohara 1.804 46.527532
S-LAH65 Ohara 1.804 46.570373
LAH65 Ohara 1.804 46.575911
S-LAH65V Ohara 1.803999 46.583432
S-LAH67 Ohara 1.794997 45.293967
LAH67 Ohara 1.794997 45.293967
LAH52 Ohara 1.799516 42.241337
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