H-ZK1 by CDGM

Standard Rare Environmentally Friendly

H-ZK1 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 1.56888 and a Vd of 62.95699. It has low thermal expansion (CTE of 6.1×10⁻⁶/K) 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) 1.56888
Abbe Number (Vd) 62.95699
Dispersion Formula Sellmeier
Wavelength Range 0.302 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{1.06132\,\lambda^2}{\lambda^2 - 0.00543667} + \frac{0.36574\,\lambda^2}{\lambda^2 - 0.0187659} + \frac{1.03467\,\lambda^2}{\lambda^2 - 97.517}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 6.1
TCE 100/300°C (10-6/K) 7.5
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[0 + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.06
Relative Cost 4.6
Mechanical Properties
Young's Modulus (GPa) 85.82
Poisson's Ratio 0.241
Knoop Hardness (kgf/mm²) 534.0
Chemical Resistance
Climatic Resistance —
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
PSK2 Schott 1.56873 63.083014
PSK2 Sumita 1.56873 63.1
S-BAL22 Ohara 1.568729 63.10486
PCD2 Hoya 1.56873 63.105028
BAL22 Ohara 1.568729 63.162358
L-PHL2 Ohara 1.5588 62.558541
P-SK11 Sumita 1.5658 61.0
K-PSK11 Sumita 1.5658 61.0
B64-61 Corning 1.564005 60.964853
SK20 Sumita 1.55963 61.2
Similar Glasses (CDGM)
Glass Manufacturer nd Vd Compare
H-BAK4 CDGM 1.55248 63.36549
H-BAK6 CDGM 1.56388 60.764747
H-BAK3 CDGM 1.54678 62.776077
D-ZK3-25 CDGM 1.58833 61.284362
H-ZK3 CDGM 1.58913 61.253571
H-ZK3A CDGM 1.58913 61.2531
D-ZK3A-25 CDGM 1.58828 61.012484
D-ZK3 CDGM 1.58913 61.152901
D-ZK3A CDGM 1.58913 61.101573
D-ZK3L-25 CDGM 1.5909 60.618517
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