KF3 by Schott

Obsolete Unknown Environmentally Dangerous

KF3 by Schott is an obsolete optical glass. It transmits from 0.33 to 2.33 µm with an nd of 1.51454 and a Vd of 54.702547. It has medium thermal expansion (CTE of 8.1×10⁻⁶/K) and dangerous environmental properties.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.334–2.325 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.334–2.325 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.334–2.325 µm
Optical Properties
Refractive Index (nd) 1.51454
Abbe Number (Vd) 54.702547
Dispersion Formula Sellmeier
Wavelength Range 0.334 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{1.15615\,\lambda^2}{\lambda^2 - 0.00789265} + \frac{0.102117\,\lambda^2}{\lambda^2 - 0.0345076} + \frac{0.927165\,\lambda^2}{\lambda^2 - 113.531}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 8.1
TCE 100/300°C (10-6/K) 9.4
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[2.56 \times 10^{-6} + 2(1.47 \times 10^{-8})\,\Delta T + 3(-2.93 \times 10^{-11})\,\Delta T^2 + \frac{5.79 \times 10^{-7} + 2(-4.07 \times 10^{-11})\,\Delta T}{\lambda - 0.194}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 2.56
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 —
Notes

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Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
NSL33 Ohara 1.514536 54.714595
CF3 Hoya 1.51454 54.628437
KF3 Sumita 1.51454 54.6
KDP Generic Birefringent 1.509182 56.224997
C2 Hoya 1.51602 56.771193
H-K8 CDGM 1.51602 56.794825
NSL2 Ohara 1.516016 56.800755
SBF5 Hoya 1.521299 52.780677
S-NSL2 Ohara 1.516016 56.858179
K-SKF6(M) Sumita 1.50847 52.6
Similar Glasses (Schott)
Glass Manufacturer nd Vd Compare
D263TECO Schott 1.523303 54.5172
K5G20 Schott 1.52344 56.76
K10 Schott 1.50137 56.41
KF6 Schott 1.517421 52.200088
K4 Schott 1.518952 57.399398
N-KF9 Schott 1.52346 51.54
KF9 Schott 1.523412 51.492996
KZFN2 Schott 1.52944 51.626811
B270 Schott 1.52308 58.571369
ZK1 Schott 1.533149 57.980912
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