K-CaFK95(M) by Sumita

Standard Medium Environmentally Friendly

K-CaFK95(M) by Sumita is a standard optical glass with a medium melt frequency. It transmits from 0.27 to 2.00 µm with an nd of 1.43312 and a Vd of 95.0. It has high thermal expansion (CTE of 12.9×10⁻⁶/K) and average 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: 0.270–2.000 µm
Optical Properties
Refractive Index (nd) 1.43312
Abbe Number (Vd) 95.0
Dispersion Formula Schott
Wavelength Range 0.36 — 1.55 µm
$$n(\lambda) = \sqrt{2.03779 - 0.00458549\,\lambda^2 + 0.00574603\,\lambda^{-2} + 0.000148242\,\lambda^{-4} - 1.29249 \times 10^{-5}\,\lambda^{-6} + 6.76409 \times 10^{-7}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 12.9
TCE 100/300°C (10-6/K) 16.7
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-2.06 \times 10^{-5} + 2(-5.62 \times 10^{-9})\,\Delta T + 3(-2.69 \times 10^{-11})\,\Delta T^2 + \frac{3.17 \times 10^{-7} + 2(3.49 \times 10^{-10})\,\Delta T}{\lambda - 0.174}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.54
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
CAF2 Generic IR 1.433849 94.995854
N-FK56 Schott 1.43425 94.953489
LITHOTEC-CAF2 Schott 1.43385 95.23
FCD100 Hoya 1.437 95.1
FPL53 Ohara 1.43875 94.960437
S-FPL53 Ohara 1.43875 94.946025
D-FK95 CDGM 1.4378 94.523389
H-FK95N CDGM 1.4378 94.523389
D-FK95-25 CDGM 1.43744 94.438841
S-FPL55 Ohara 1.43875 94.661059
Similar Glasses (Sumita)
Glass Manufacturer nd Vd Compare
CAFK95 Sumita 1.43425 95.0
K-CaFK95 Sumita 1.43425 95.0
K-FIR97UV Sumita 1.4258 97.4
K-FIR98UV Sumita 1.42537 97.8
K-PFK90 Sumita 1.4588 90.0
K-PFK90(M) Sumita 1.45733 89.8
K-FIR100UV(M) Sumita 1.41268 100.7
K-FIR100UV Sumita 1.4139 101.0
PFK85 Sumita 1.48563 85.2
K-PFK85 Sumita 1.48563 85.2
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