K11 by Schott

Obsolete Unknown Environmentally Dangerous

K11 by Schott is an obsolete optical glass. It transmits from 0.33 to 0.85 µm with an nd of 1.50013 and a Vd of 61.438579. It has low thermal expansion (CTE of 6.4×10⁻⁶/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: 0.334–0.850 µm
Optical Properties
Refractive Index (nd) 1.50013
Abbe Number (Vd) 61.438579
Dispersion Formula Sellmeier
Wavelength Range 0.334 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{1.1625\,\lambda^2}{\lambda^2 - 0.0075327} + \frac{0.0582614\,\lambda^2}{\lambda^2 - 0.0359084} + \frac{0.905204\,\lambda^2}{\lambda^2 - 102.405}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 6.4
TCE 100/300°C (10-6/K) 7.0
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[2.65 \times 10^{-6} + 2(1.98 \times 10^{-8})\,\Delta T + 3(-3.64 \times 10^{-11})\,\Delta T^2 + \frac{4.35 \times 10^{-7} + 2(4.51 \times 10^{-10})\,\Delta T}{\lambda - 0.187}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 2.5
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
K11 Sumita 1.50013 61.6
H-K1 CDGM 1.49967 62.071979
K4A CDGM 1.50802 61.052897
ZNC7 Hoya 1.508471 61.266087
K7 Sumita 1.51112 60.5
NSL7 Ohara 1.511121 60.485793
C7 Hoya 1.511122 60.485929
H-K6 CDGM 1.511125 60.478905
B11-60 Corning 1.510999 60.383147
H-K7 CDGM 1.51478 60.634896
Similar Glasses (Schott)
Glass Manufacturer nd Vd Compare
N-ZK7A Schott 1.508054 61.04
N-ZK7 Schott 1.50847 61.19
ZKN7 Schott 1.508469 61.187789
K7HT Schott 1.511144 60.466081
K7 Schott 1.51112 60.41
AF32ECO Schott 1.511531 62.574031
BK1 Schott 1.510091 63.464788
BALKN3 Schott 1.518489 60.259571
UK50 Schott 1.522571 60.383109
K50 Schott 1.522572 60.179756
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