H-ZK50GT by CDGM

Preferred Medium Environmentally Friendly

H-ZK50GT by CDGM is a preferred optical glass with a medium melt frequency. It transmits from 0.28 to 2.40 µm with an nd of 1.60738 and a Vd of 56.654511. It has medium thermal expansion (CTE of 6.8×10⁻⁶/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: 0.280–2.400 µm
Optical Properties
Refractive Index (nd) 1.60738
Abbe Number (Vd) 56.654511
Dispersion Formula Sellmeier
Wavelength Range 0.302 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{0.434311\,\lambda^2}{\lambda^2 - -0.00192253} + \frac{1.1056\,\lambda^2}{\lambda^2 - 0.0147271} + \frac{0.988776\,\lambda^2}{\lambda^2 - 110.412}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 6.8
TCE 100/300°C (10-6/K) 7.7
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[3.24 \times 10^{-6} + 2(1.77 \times 10^{-8})\,\Delta T + 3(-2.57 \times 10^{-11})\,\Delta T^2 + \frac{5.34 \times 10^{-7} + 2(1.22 \times 10^{-10})\,\Delta T}{\lambda - 0.194}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.54
Relative Cost 3.6
Mechanical Properties
Young's Modulus (GPa) 75.98
Poisson's Ratio 0.266
Knoop Hardness (kgf/mm²) 511.0
Chemical Resistance
Climatic Resistance 1
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
SK2 Schott 1.607381 56.650108
N-SK2 Schott 1.60738 56.65
N-SK2HT Schott 1.60738 56.65
SK2 Sumita 1.60738 56.7
C07-57 Corning 1.607504 56.610495
BACD2 Hoya 1.60738 56.72
BSM2 Ohara 1.607379 56.815789
S-BSM2 Ohara 1.607379 56.816076
BACD1 Hoya 1.610248 56.650958
SK1 Schott 1.61025 56.712386
Similar Glasses (CDGM)
Glass Manufacturer nd Vd Compare
H-ZK50 CDGM 1.60738 56.654511
H-ZK5 CDGM 1.61117 55.772437
D-ZK79-25 CDGM 1.60809 57.820851
D-ZK79 CDGM 1.60886 57.895896
H-ZK8 CDGM 1.61405 55.116283
H-ZK10 CDGM 1.6221 56.709831
H-ZK6 CDGM 1.61272 58.577083
H-ZK10L CDGM 1.6228 56.913492
H-ZK4 CDGM 1.60881 58.855991
H-ZK21 CDGM 1.62299 58.120667
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