H-ZK2 by CDGM

Standard Rare Environmentally Friendly

H-ZK2 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 1.58313 and a Vd of 59.460082. It has low thermal expansion (CTE of 6.1×10⁻⁶/K), good 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) 1.58313
Abbe Number (Vd) 59.460082
Dispersion Formula Sellmeier
Wavelength Range 0.302 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{0.427443\,\lambda^2}{\lambda^2 - 0.0191755} + \frac{0.907024\,\lambda^2}{\lambda^2 - 94.6356} + \frac{1.04012\,\lambda^2}{\lambda^2 - 0.00552619}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 6.1
TCE 100/300°C (10-6/K) 7.8
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[2.23 \times 10^{-6} + 2(2.61 \times 10^{-8})\,\Delta T + 3(-7.02 \times 10^{-11})\,\Delta T^2 + \frac{4.76 \times 10^{-7} + 2(-6.76 \times 10^{-10})\,\Delta T}{\lambda - 0.184}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.24
Relative Cost 3.1
Mechanical Properties
Young's Modulus (GPa) 80.77
Poisson's Ratio 0.255
Knoop Hardness (kgf/mm²) 559.0
Chemical Resistance
Climatic Resistance 2
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
MC-BACD12 Hoya 1.58313 59.46
MP-BACD12 Hoya 1.58313 59.46
M-BACD12 Hoya 1.58313 59.46
BACD12 Hoya 1.583129 59.459639
SK12 Schott 1.583131 59.448822
L-BAL42 Ohara 1.583126 59.385694
S-BAL42 Ohara 1.583126 59.374673
BAL42 Ohara 1.583126 59.373789
K-SKLD120(M) Sumita 1.58401 59.5
SK12 Sumita 1.58313 59.3
Similar Glasses (CDGM)
Glass Manufacturer nd Vd Compare
D-ZK2 CDGM 1.58313 59.381686
D-ZK2A CDGM 1.58313 59.539751
D-ZK2A-25 CDGM 1.58229 59.453631
D-ZK2-25 CDGM 1.58241 59.308255
D-ZK2L-25 CDGM 1.58625 59.524868
D-ZK2L CDGM 1.587 59.600321
D-ZK3L-25 CDGM 1.5909 60.618517
D-ZK3L CDGM 1.5917 60.701147
D-ZK3A-25 CDGM 1.58828 61.012484
D-ZK3A CDGM 1.58913 61.101573
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