H-ZK6 by CDGM

Preferred Medium Environmentally Friendly

H-ZK6 by CDGM is a preferred optical glass with a medium melt frequency. It transmits from 0.31 to 2.40 µm with an nd of 1.61272 and a Vd of 58.577083. It has low thermal expansion (CTE of 6.3×10⁻⁶/K), good chemical resistance, and low relative cost.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.313–2.325 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.313–2.325 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.310–2.400 µm
Optical Properties
Refractive Index (nd) 1.61272
Abbe Number (Vd) 58.577083
Dispersion Formula Sellmeier
Wavelength Range 0.313 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{1.35139\,\lambda^2}{\lambda^2 - 0.00735017} + \frac{0.206957\,\lambda^2}{\lambda^2 - 0.0254398} + \frac{0.961154\,\lambda^2}{\lambda^2 - 99.5133}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 6.3
TCE 100/300°C (10-6/K) 7.9
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[1.08 \times 10^{-7} + 2(1.53 \times 10^{-8})\,\Delta T + 3(-3.29 \times 10^{-11})\,\Delta T^2 + \frac{4.32 \times 10^{-7} + 2(6.25 \times 10^{-10})\,\Delta T}{\lambda - 0.191}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.54
Relative Cost 2.2
Mechanical Properties
Young's Modulus (GPa) 82.53
Poisson's Ratio 0.267
Knoop Hardness (kgf/mm²) 516.0
Chemical Resistance
Climatic Resistance 2
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
BACD4 Hoya 1.61272 58.58
C13-58 Corning 1.612693 58.570371
SK4 Sumita 1.61272 58.6
K-SK4 Sumita 1.61272 58.6
SK4 Schott 1.61272 58.629829
N-SK4 Schott 1.61272 58.63
S-BSM4 Ohara 1.612716 58.716945
BSM4 Ohara 1.612716 58.749129
K-PSK200(M) Sumita 1.61083 58.9
K-PSK200 Sumita 1.61305 59.0
Similar Glasses (CDGM)
Glass Manufacturer nd Vd Compare
H-ZK4 CDGM 1.60881 58.855991
D-ZK79 CDGM 1.60886 57.895896
D-ZK79-25 CDGM 1.60809 57.820851
H-ZK21 CDGM 1.62299 58.120667
D-ZK21-25 CDGM 1.62346 58.115078
D-ZK21 CDGM 1.62446 58.207924
H-ZK7A CDGM 1.61309 60.355862
H-ZK7 CDGM 1.613095 60.614383
H-TK9 CDGM 1.62075 60.299778
H-ZK9B CDGM 1.62041 60.339343
Compare Glasses
    Compare Selected