KZFS4 by Sumita

Obsolete Very Rare Environmentally Dangerous

KZFS4 by Sumita is an obsolete optical glass with a very rare melt frequency. It transmits from 0.31 to 2.00 µm with an nd of 1.6134 and a Vd of 43.8. 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: 0.310–2.000 µm
Optical Properties
Refractive Index (nd) 1.6134
Abbe Number (Vd) 43.8
Dispersion Formula Schott
Wavelength Range 0.27 — 2.0 µm
$$n(\lambda) = \sqrt{2.54813 - 0.0130189\,\lambda^2 + 0.019202\,\lambda^{-2} + 0.0004294\,\lambda^{-4} + 4.202 \times 10^{-6}\,\lambda^{-6} + 1.46101 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) —
TCE 100/300°C (10-6/K) 4.9
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) 3.15
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance 1
Stain Resistance —
Acid Resistance 4
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
BPM4 Ohara 1.6134 43.841533
H-TF3L CDGM 1.6134 44.107022
TF3 CDGM 1.612423 44.093486
BPM51 Ohara 1.613397 44.266767
S-NBM51 Ohara 1.613397 44.267706
KZFSN4 Schott 1.6134 44.29
ADF40 Hoya 1.6134 44.290061
LAF45 Hoya 1.61396 44.29
KZFS1 Schott 1.613099 44.339473
E-ADF10 Hoya 1.6131 44.36
Similar Glasses (Sumita)
Glass Manufacturer nd Vd Compare
BAF4 Sumita 1.60562 43.9
K-LCV161 Sumita 1.6182 45.3
K-LCV161(M) Sumita 1.61477 45.6
BASF5 Sumita 1.60323 42.5
K-BaSF5 Sumita 1.60323 42.5
BAF8 Sumita 1.62374 47.1
K-BaF8 Sumita 1.62374 47.1
BASF3 Sumita 1.60717 40.2
BAF12 Sumita 1.6393 45.0
LF2 Sumita 1.58921 41.0
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