LAKN10 by Sumita

Obsolete Very Rare Environmentally Dangerous

LAKN10 by Sumita is an obsolete optical glass with a very rare melt frequency. It transmits from 0.33 to 2.00 µm with an nd of 1.692 and a Vd of 50.6. It has average chemical resistance and dangerous environmental properties.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.27–2.0 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.27–2.0 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.330–2.000 µm
Optical Properties
Refractive Index (nd) 1.692
Abbe Number (Vd) 50.6
Dispersion Formula Schott
Wavelength Range 0.27 — 2.0 µm
$$n(\lambda) = \sqrt{2.80335 - 0.0102837\,\lambda^2 + 0.0208117\,\lambda^{-2} + 0.000276256\,\lambda^{-4} + 1.97752 \times 10^{-5}\,\lambda^{-6} - 2.81272 \times 10^{-7}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) —
TCE 100/300°C (10-6/K) 9.1
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[0 + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 4.07
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 2
Stain Resistance —
Acid Resistance 4
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
LACL5 Hoya 1.693503 50.787122
LAL58 Ohara 1.693495 50.807634
S-LAL58 Ohara 1.693495 50.810652
LAFN23 Schott 1.689004 49.711581
C90-50 Corning 1.689009 49.625392
S-LAL20 Ohara 1.6993 51.112184
LAFL23 Hoya 1.689 49.475821
H-LAF1 CDGM 1.69362 49.193837
LAFL1 Hoya 1.686004 49.347081
LACL9 Hoya 1.6779 50.551353
Similar Glasses (Sumita)
Glass Manufacturer nd Vd Compare
LAFN1 Sumita 1.685 49.2
LAKN8 Sumita 1.678 50.7
LAFN2 Sumita 1.697 48.5
K-VC80(M) Sumita 1.68983 52.9
K-VC80 Sumita 1.69384 53.1
LAK13 Sumita 1.6935 53.4
K-LaFn3 Sumita 1.7 48.0
LAFN3 Sumita 1.7 48.0
LAKN7 Sumita 1.67 51.7
K-LaKn7 Sumita 1.67 51.7
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