H-ZK5 by CDGM

Standard Rare Environmentally Friendly

H-ZK5 by CDGM is a standard optical glass with a rare melt frequency. It transmits from 0.29 to 2.40 µm with an nd of 1.61117 and a Vd of 55.772437. It has medium thermal expansion (CTE of 8.6×10⁻⁶/K), excellent chemical resistance, and moderate 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) 1.61117
Abbe Number (Vd) 55.772437
Dispersion Formula Sellmeier
Wavelength Range 0.302 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{0.920219\,\lambda^2}{\lambda^2 - 109.362} + \frac{0.531425\,\lambda^2}{\lambda^2 - 0.0198986} + \frac{1.01909\,\lambda^2}{\lambda^2 - 0.0052582}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 8.6
TCE 100/300°C (10-6/K) 9.9
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-3.46 \times 10^{-6} + 2(1.21 \times 10^{-8})\,\Delta T + 3(1.31 \times 10^{-11})\,\Delta T^2 + \frac{5.78 \times 10^{-7} + 2(6.03 \times 10^{-10})\,\Delta T}{\lambda - 0.17}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.58
Relative Cost 3.5
Mechanical Properties
Young's Modulus (GPa) 78.81
Poisson's Ratio 0.27
Knoop Hardness (kgf/mm²) 521.0
Chemical Resistance
Climatic Resistance 1
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
BACD8 Hoya 1.611168 55.774369
SK8 Schott 1.611171 55.917724
BSM6 Ohara 1.613749 56.365919
BACD6 Hoya 1.613753 56.377856
SK6 Schott 1.61375 56.397311
C13-56 Corning 1.613498 56.417725
SK1 Sumita 1.61025 56.5
BACD9 Hoya 1.614047 55.118097
SK9 Sumita 1.61405 55.1
S-BSM9 Ohara 1.614047 54.990097
Similar Glasses (CDGM)
Glass Manufacturer nd Vd Compare
H-ZK8 CDGM 1.61405 55.116283
H-ZK50 CDGM 1.60738 56.654511
H-ZK50GT CDGM 1.60738 56.654511
H-ZK10 CDGM 1.6221 56.709831
H-ZK10L CDGM 1.6228 56.913492
H-ZK20 CDGM 1.6172 53.913743
D-ZK79-25 CDGM 1.60809 57.820851
D-ZK79 CDGM 1.60886 57.895896
H-ZK6 CDGM 1.61272 58.577083
H-ZK21 CDGM 1.62299 58.120667
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