K-VC100(M) by Sumita

Standard Rare Environmentally Friendly

K-VC100(M) by Sumita is a standard optical glass with a rare melt frequency. It transmits from 0.33 to 2.00 µm with an nd of 1.79916 and a Vd of 43.5. It has low thermal expansion (CTE of 5.8×10⁻⁶/K) and good chemical resistance.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.36–1.55 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.36–1.55 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.330–2.000 µm
Optical Properties
Refractive Index (nd) 1.79916
Abbe Number (Vd) 43.5
Dispersion Formula Schott
Wavelength Range 0.36 — 1.55 µm
$$n(\lambda) = \sqrt{3.15444 - 0.0148067\,\lambda^2 + 0.0279968\,\lambda^{-2} + 0.000793796\,\lambda^{-4} - 1.08026 \times 10^{-5}\,\lambda^{-6} + 2.17233 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 5.8
TCE 100/300°C (10-6/K) 7.2
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[4.79 \times 10^{-6} + 2(1.51 \times 10^{-8})\,\Delta T + 3(-1.35 \times 10^{-10})\,\Delta T^2 + \frac{6.25 \times 10^{-7} + 2(7.77 \times 10^{-10})\,\Delta T}{\lambda - 0.229}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 4.71
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 —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
D96-43 Corning 1.796195 43.217783
H-ZLAF1 CDGM 1.80166 44.263459
NBFD14 Hoya 1.801699 44.321602
N-LAF36 Schott 1.79952 42.37
NBFD12 Hoya 1.7995 42.34
H-LAF54 CDGM 1.799519 42.253294
LAH52 Ohara 1.799516 42.241337
S-LAH52Q Ohara 1.79952 42.239506
S-LAH52 Ohara 1.799516 42.225007
NBFD1 Hoya 1.789004 42.757634
Similar Glasses (Sumita)
Glass Manufacturer nd Vd Compare
K-VC100 Sumita 1.804 43.6
K-LaSFn3 Sumita 1.7995 42.3
LASFN3 Sumita 1.7995 42.3
K-VC179 Sumita 1.7989 41.8
K-VC179(M) Sumita 1.79441 41.9
LASFN19 Sumita 1.795 45.2
LASFN4 Sumita 1.785 43.7
K-LaSFn4 Sumita 1.785 43.7
LASFN10 Sumita 1.8155 44.4
K-LaSFn10 Sumita 1.8155 44.4
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