LAM52 by Ohara

Obsolete Unknown Environmentally Friendly

LAM52 by Ohara is an obsolete optical glass. It transmits from 0.40 to 0.90 µm with an nd of 1.72 and a Vd of 43.705625. It has medium thermal expansion (CTE of 8.0×10⁻⁶/K).

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: 0.400–0.900 µm
Optical Properties
Refractive Index (nd) 1.72
Abbe Number (Vd) 43.705625
Dispersion Formula Schott
Wavelength Range 0.365 — 0.9 µm
$$n(\lambda) = \sqrt{2.88808 - 0.0113304\,\lambda^2 + 0.0230614\,\lambda^{-2} + 0.00100449\,\lambda^{-4} - 5.63021 \times 10^{-5}\,\lambda^{-6} + 5.24847 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 8.0
TCE 100/300°C (10-6/K) 9.1
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-8.8015 \times 10^{-7} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) 4.15
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
LAFN4 Sumita 1.72 43.7
H-LAF62 CDGM 1.72 43.680739
LAFL5 Hoya 1.719998 43.903303
LAFL4 Hoya 1.712704 43.295113
LAFN10 Sumita 1.72016 42.1
LAFL6 Hoya 1.72 42.016239
K-LaFn11 Sumita 1.72013 46.0
LAFN11 Sumita 1.72013 46.0
LAFN8 Schott 1.735197 41.590899
LAF2 Schott 1.744002 44.719972
Similar Glasses (Ohara)
Glass Manufacturer nd Vd Compare
S-LAM52 Ohara 1.72 43.689812
LAM58 Ohara 1.72 41.989859
S-LAM58 Ohara 1.72 41.978463
S-LAM61 Ohara 1.720002 46.024571
LAM61 Ohara 1.720002 46.035166
S-LAM2 Ohara 1.743997 44.786431
LAM2 Ohara 1.743997 44.787528
BAH27 Ohara 1.701536 41.242277
L-LAM69 Ohara 1.73077 40.508156
S-BAH27 Ohara 1.701536 41.23944
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