D-ZK79 by CDGM

Standard Rare Precision Molding Environmentally Friendly

D-ZK79 by CDGM is a standard optical glass with a rare melt frequency. It transmits from 0.30 to 2.40 µm with an nd of 1.60886 and a Vd of 57.895896. It has medium thermal expansion (CTE of 8.1×10⁻⁶/K), below average chemical resistance, high relative cost, and precision molding compatibility.

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: 0.300–2.400 µm
Optical Properties
Refractive Index (nd) 1.60886
Abbe Number (Vd) 57.895896
Dispersion Formula Sellmeier
Wavelength Range 0.302 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{0.756951\,\lambda^2}{\lambda^2 - 0.00314479} + \frac{0.788924\,\lambda^2}{\lambda^2 - 0.0162552} + \frac{1.1045\,\lambda^2}{\lambda^2 - 112.96}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 8.1
TCE 100/300°C (10-6/K) 9.9
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[6.7 \times 10^{-7} + 2(1.89 \times 10^{-8})\,\Delta T + 3(-2.68 \times 10^{-10})\,\Delta T^2 + \frac{2.21 \times 10^{-7} + 2(1.09 \times 10^{-9})\,\Delta T}{\lambda - 0.312}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.19
Relative Cost 8.7
Mechanical Properties
Young's Modulus (GPa) 93.01
Poisson's Ratio 0.262
Knoop Hardness (kgf/mm²) 586.0
Chemical Resistance
Climatic Resistance 4
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Notes

anneal rate:4℃/h

Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
VC79 Sumita 1.6097 57.8
K-VC79 Sumita 1.61035 57.9
P-SK60 Schott 1.61035 57.9
K-VC79(M) Sumita 1.60737 57.2
C13-58 Corning 1.612693 58.570371
BACD4 Hoya 1.61272 58.58
K-SK4 Sumita 1.61272 58.6
SK4 Sumita 1.61272 58.6
SK4 Schott 1.61272 58.629829
N-SK4 Schott 1.61272 58.63
Similar Glasses (CDGM)
Glass Manufacturer nd Vd Compare
D-ZK79-25 CDGM 1.60809 57.820851
H-ZK6 CDGM 1.61272 58.577083
H-ZK4 CDGM 1.60881 58.855991
H-ZK50 CDGM 1.60738 56.654511
H-ZK50GT CDGM 1.60738 56.654511
H-ZK21 CDGM 1.62299 58.120667
D-ZK21-25 CDGM 1.62346 58.115078
H-ZK10L CDGM 1.6228 56.913492
D-ZK21 CDGM 1.62446 58.207924
H-ZK5 CDGM 1.61117 55.772437
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