H-ZK11 by CDGM

Preferred Very Common Environmentally Friendly

H-ZK11 by CDGM is a preferred optical glass with a very common melt frequency. It transmits from 0.33 to 2.40 µm with an nd of 1.63854 and a Vd of 55.446553. It has medium thermal expansion (CTE of 6.9×10⁻⁶/K), average chemical resistance, and low relative cost.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.313–2.325 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.313–2.325 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.330–2.400 µm
Optical Properties
Refractive Index (nd) 1.63854
Abbe Number (Vd) 55.446553
Dispersion Formula Sellmeier
Wavelength Range 0.313 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{0.0534615\,\lambda^2}{\lambda^2 - 0.045643} + \frac{1.58378\,\lambda^2}{\lambda^2 - 0.0091226} + \frac{0.918196\,\lambda^2}{\lambda^2 - 89.3234}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 6.9
TCE 100/300°C (10-6/K) 8.2
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-1.64 \times 10^{-6} + 2(1.58 \times 10^{-8})\,\Delta T + 3(-3.17 \times 10^{-11})\,\Delta T^2 + \frac{4.74 \times 10^{-7} + 2(3.85 \times 10^{-10})\,\Delta T}{\lambda - 0.203}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.69
Relative Cost 1.0
Mechanical Properties
Young's Modulus (GPa) 87.11
Poisson's Ratio 0.272
Knoop Hardness (kgf/mm²) 512.0
Chemical Resistance
Climatic Resistance 3
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
BACD18 Hoya 1.63854 55.45
SK18A Schott 1.63854 55.423596
N-SK18 Schott 1.63854 55.423596
K-SK18RH Sumita 1.63854 55.5
SK18RH Sumita 1.63854 55.5
SK18 Sumita 1.63854 55.5
K-SK18 Sumita 1.63854 55.5
C39-56 Corning 1.638505 55.504447
BSM18 Ohara 1.638539 55.384768
S-BSM18 Ohara 1.638539 55.380028
Similar Glasses (CDGM)
Glass Manufacturer nd Vd Compare
H-LAK10 CDGM 1.65113 55.890872
H-ZK10 CDGM 1.6221 56.709831
H-ZK10L CDGM 1.6228 56.913492
H-ZBAF1 CDGM 1.6223 53.170869
H-ZK20 CDGM 1.6172 53.913743
H-ZK8 CDGM 1.61405 55.116283
D-ZK21 CDGM 1.62446 58.207924
D-ZK21-25 CDGM 1.62346 58.115078
H-ZK21 CDGM 1.62299 58.120667
H-LAK1 CDGM 1.6595 57.34726
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