H-ZK9B by CDGM

Preferred Very Common Environmentally Friendly

H-ZK9B by CDGM is a preferred optical glass with a very common melt frequency. It transmits from 0.29 to 2.40 µm with an nd of 1.62041 and a Vd of 60.339343. It has low thermal expansion (CTE of 6.2×10⁻⁶/K), below average chemical resistance, and low relative cost.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.302–2.325 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.302–2.325 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.290–2.400 µm
Optical Properties
Refractive Index (nd) 1.62041
Abbe Number (Vd) 60.339343
Dispersion Formula Sellmeier
Wavelength Range 0.302 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{0.874919\,\lambda^2}{\lambda^2 - 0.00373965} + \frac{0.709627\,\lambda^2}{\lambda^2 - 0.0163972} + \frac{1.09454\,\lambda^2}{\lambda^2 - 100.204}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 6.2
TCE 100/300°C (10-6/K) 7.7
Thermal Conductivity (W/mK) 0.654
Heat Capacity (J/gK) 0.458
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-9.86 \times 10^{-7} + 2(1.83 \times 10^{-8})\,\Delta T + 3(-3.36 \times 10^{-11})\,\Delta T^2 + \frac{3.65 \times 10^{-7} + 2(9.55 \times 10^{-11})\,\Delta T}{\lambda - 0.222}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.58
Relative Cost 1.0
Mechanical Properties
Young's Modulus (GPa) 89.85
Poisson's Ratio 0.265
Knoop Hardness (kgf/mm²) 574.0
Chemical Resistance
Climatic Resistance 4
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
C20-60 Corning 1.620406 60.332956
BACD16 Hoya 1.62041 60.35
SK16 Schott 1.62041 60.323649
N-SK16 Schott 1.62041 60.32
SK16RH Sumita 1.62041 60.3
SK16 Sumita 1.62041 60.3
K-SK16RH Sumita 1.62041 60.3
S-BSM16 Ohara 1.620411 60.289582
BSM16 Ohara 1.62041 60.271913
SK51 Schott 1.6209 60.310926
Similar Glasses (CDGM)
Glass Manufacturer nd Vd Compare
H-ZK9A CDGM 1.620412 60.368242
H-TK9 CDGM 1.62075 60.299778
H-ZK7A CDGM 1.61309 60.355862
H-ZK7 CDGM 1.613095 60.614383
H-ZK6 CDGM 1.61272 58.577083
H-ZK4 CDGM 1.60881 58.855991
D-ZK21 CDGM 1.62446 58.207924
H-ZK21 CDGM 1.62299 58.120667
D-ZK21-25 CDGM 1.62346 58.115078
H-ZK14 CDGM 1.60311 60.603787
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