H-ZF5 by CDGM

Preferred Very Common Environmentally Friendly

H-ZF5 by CDGM is a preferred optical glass with a very common melt frequency. It transmits from 0.37 to 2.40 µm with an nd of 1.74 and a Vd of 28.295649. It has medium thermal expansion (CTE of 8.9×10⁻⁶/K), excellent chemical resistance, and moderate relative cost.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.365–2.325 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.365–2.325 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.370–2.400 µm
Optical Properties
Refractive Index (nd) 1.74
Abbe Number (Vd) 28.295649
Dispersion Formula Sellmeier
Wavelength Range 0.365 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{1.70025\,\lambda^2}{\lambda^2 - 0.0133278} + \frac{1.36323\,\lambda^2}{\lambda^2 - 122.334} + \frac{0.214513\,\lambda^2}{\lambda^2 - 0.0635763}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 8.9
TCE 100/300°C (10-6/K) 10.8
Thermal Conductivity (W/mK) 0.806
Heat Capacity (J/gK) 0.615
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-4.09 \times 10^{-6} + 2(1.23 \times 10^{-8})\,\Delta T + 3(-2.03 \times 10^{-11})\,\Delta T^2 + \frac{7.19 \times 10^{-7} + 2(1.12 \times 10^{-9})\,\Delta T}{\lambda - 0.315}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.16
Relative Cost 4.1
Mechanical Properties
Young's Modulus (GPa) 90.61
Poisson's Ratio 0.257
Knoop Hardness (kgf/mm²) 563.0
Chemical Resistance
Climatic Resistance 1
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
S-TIH3 Ohara 1.739998 28.296005
PBH3W Ohara 1.739998 28.287409
PBH3 Ohara 1.739998 28.283809
FD3 Hoya 1.739999 28.245048
SF3 Schott 1.74 28.2
SF3 Sumita 1.74 28.2
D40-28 Corning 1.740001 28.102623
SF54 Schott 1.7408 28.090813
PBH13W Ohara 1.740769 27.793228
PBH13 Ohara 1.740769 27.793228
Similar Glasses (CDGM)
Glass Manufacturer nd Vd Compare
ZF5 CDGM 1.739999 28.245048
ZF50 CDGM 1.74077 27.76788
H-ZF50 CDGM 1.74077 27.760063
ZF4 CDGM 1.728251 28.3239
H-ZF4AGT CDGM 1.72825 28.318797
H-ZF4A CDGM 1.72825 28.318797
ZF6 CDGM 1.755205 27.546239
H-ZF6 CDGM 1.7552 27.530047
H-ZF3 CDGM 1.71736 29.49911
ZF3 CDGM 1.717365 29.510385
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