LAFK60 by Sumita

Obsolete Very Rare Environmentally Dangerous

LAFK60 by Sumita is an obsolete optical glass with a very rare melt frequency. It transmits from 0.27 to 2.00 µm with an nd of 1.63246 and a Vd of 63.8. 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: 0.270–2.000 µm
Optical Properties
Refractive Index (nd) 1.63246
Abbe Number (Vd) 63.8
Dispersion Formula Schott
Wavelength Range 0.27 — 2.0 µm
$$n(\lambda) = \sqrt{2.62429 - 0.0100102\,\lambda^2 + 0.0147595\,\lambda^{-2} + 0.000121629\,\lambda^{-4} + 1.53833 \times 10^{-5}\,\lambda^{-6} - 7.25928 \times 10^{-7}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) —
TCE 100/300°C (10-6/K) 11.4
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) 4.32
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 1
Stain Resistance —
Acid Resistance 5
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
D-ZPK1A CDGM 1.62087 63.828532
D-ZPK1A-25 CDGM 1.61999 63.763831
PCD53 Hoya 1.620139 63.516754
PCD40 Hoya 1.61997 63.88
PSK53A Schott 1.620141 63.480444
N-PSK53 Schott 1.62014 63.48
MP-PCD4-40 Hoya 1.61921 63.85
MC-PCD4-40 Hoya 1.61921 63.85
M-PCD4 Hoya 1.61881 63.85
PCD4 Hoya 1.618 63.4
Similar Glasses (Sumita)
Glass Manufacturer nd Vd Compare
K-LaFK60 Sumita 1.63246 63.8
K-LaFK60(M) Sumita 1.62848 63.2
K-LaFK63(M) Sumita 1.63463 63.0
K-LaFK63 Sumita 1.6386 63.4
K-PSKn2 Sumita 1.618 63.4
PSKN2 Sumita 1.618 63.4
K-LaFK65(M) Sumita 1.65224 62.2
K-LaFK65 Sumita 1.6567 62.3
K-LaKn2 Sumita 1.6405 60.1
LAKN2 Sumita 1.6405 60.1
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