H-ZF2 by CDGM

Preferred Very Common Environmentally Friendly

H-ZF2 by CDGM is a preferred optical glass with a very common melt frequency. It transmits from 0.36 to 2.40 µm with an nd of 1.6727 and a Vd of 32.171186. It has medium thermal expansion (CTE of 8.5×10⁻⁶/K), excellent chemical resistance, and low 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: 0.360–2.400 µm
Optical Properties
Refractive Index (nd) 1.6727
Abbe Number (Vd) 32.171186
Dispersion Formula Sellmeier
Wavelength Range 0.365 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{0.167643\,\lambda^2}{\lambda^2 - 0.0605178} + \frac{1.54335\,\lambda^2}{\lambda^2 - 0.0118524} + \frac{1.17313\,\lambda^2}{\lambda^2 - 113.671}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 8.5
TCE 100/300°C (10-6/K) 10.6
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-3.63 \times 10^{-6} + 2(1.35 \times 10^{-8})\,\Delta T + 3(-5.31 \times 10^{-11})\,\Delta T^2 + \frac{8.33 \times 10^{-7} + 2(8.4 \times 10^{-10})\,\Delta T}{\lambda - 0.278}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 2.9
Relative Cost 1.6
Mechanical Properties
Young's Modulus (GPa) 83.21
Poisson's Ratio 0.241
Knoop Hardness (kgf/mm²) 552.0
Chemical Resistance
Climatic Resistance 1
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
E-FD5 Hoya 1.6727 32.17
FD5 Hoya 1.672701 32.173263
SF5 Sumita 1.6727 32.2
SF5 Schott 1.6727 32.21
PBM25 Ohara 1.6727 32.101636
S-TIM25 Ohara 1.6727 32.099206
N-SF5 Schott 1.67271 32.25
C72-32 Corning 1.672698 32.31788
SF19 Schott 1.6668 33.005581
PBM39 Ohara 1.666799 33.046816
Similar Glasses (CDGM)
Glass Manufacturer nd Vd Compare
ZF2 CDGM 1.672707 32.180986
H-ZF39 CDGM 1.6668 33.053728
D-ZF10-25 CDGM 1.68731 31.183804
ZF10 CDGM 1.688934 31.184753
H-ZF10 CDGM 1.68893 31.16057
D-ZF10 CDGM 1.68893 31.077677
ZF8 CDGM 1.65446 33.651201
H-ZBAF4 CDGM 1.66426 35.484251
ZF1 CDGM 1.647693 33.836872
H-ZF1 CDGM 1.64769 33.840317
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