K10 by Schott

Preferred Unknown Environmentally Dangerous

K10 by Schott is a preferred optical glass. It transmits from 0.30 to 2.50 µm with an nd of 1.50137 and a Vd of 56.41. It has low thermal expansion (CTE of 6.5×10⁻⁶/K), excellent chemical resistance, low relative cost, and dangerous environmental properties.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.3–2.5 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.3–2.5 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.300–2.500 µm
Optical Properties
Refractive Index (nd) 1.50137
Abbe Number (Vd) 56.41
Dispersion Formula Sellmeier
Wavelength Range 0.3 — 2.5 µm
$$n(\lambda) = \sqrt{1 + \frac{1.15687\,\lambda^2}{\lambda^2 - 0.00809424} + \frac{0.0642625\,\lambda^2}{\lambda^2 - 0.0386051} + \frac{0.872376\,\lambda^2}{\lambda^2 - 104.748}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 6.5
TCE 100/300°C (10-6/K) 7.4
Thermal Conductivity (W/mK) 1.12
Heat Capacity (J/gK) 0.77
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[4.86 \times 10^{-6} + 2(1.72 \times 10^{-8})\,\Delta T + 3(-3.02 \times 10^{-11})\,\Delta T^2 + \frac{3.82 \times 10^{-7} + 2(4.53 \times 10^{-10})\,\Delta T}{\lambda - 0.26}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 2.52
Relative Cost 2.6
Mechanical Properties
Young's Modulus (GPa) 65.0
Poisson's Ratio 0.19
Knoop Hardness (kgf/mm²) 470.0
Chemical Resistance
Climatic Resistance 1
Stain Resistance 0
Acid Resistance 1
Alkali Resistance 1
Phosphate Resistance 1
Notes

lead containing glass type

Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
FTL10 Ohara 1.501372 56.399833
S-FTL10 Ohara 1.501372 56.421009
C10 Hoya 1.50137 56.296772
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
S-NSL2 Ohara 1.516016 56.858179
NSL33 Ohara 1.514536 54.714595
CF3 Hoya 1.51454 54.628437
Similar Glasses (Schott)
Glass Manufacturer nd Vd Compare
KF3 Schott 1.51454 54.702547
K4 Schott 1.518952 57.399398
K5G20 Schott 1.52344 56.76
K3 Schott 1.51823 58.976559
D263TECO Schott 1.523303 54.5172
B270 Schott 1.52308 58.571369
N-K5 Schott 1.52249 59.48
K5 Schott 1.522489 59.482671
K7 Schott 1.51112 60.41
K5HT Schott 1.522453 59.530889
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