H-ZF1 by CDGM

Preferred Very Common Environmentally Friendly

H-ZF1 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 1.64769 and a Vd of 33.840317. It has medium thermal expansion (CTE of 9.1×10⁻⁶/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) 1.64769
Abbe Number (Vd) 33.840317
Dispersion Formula Sellmeier
Wavelength Range 0.365 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{1.06294\,\lambda^2}{\lambda^2 - 108.4} + \frac{0.146911\,\lambda^2}{\lambda^2 - 0.0591797} + \frac{1.48923\,\lambda^2}{\lambda^2 - 0.0115933}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 9.1
TCE 100/300°C (10-6/K) 11.7
Thermal Conductivity (W/mK) 0.821
Heat Capacity (J/gK) 0.677
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-4.73 \times 10^{-6} + 2(1.27 \times 10^{-8})\,\Delta T + 3(-8.17 \times 10^{-11})\,\Delta T^2 + \frac{8.61 \times 10^{-7} + 2(9.43 \times 10^{-10})\,\Delta T}{\lambda - 0.263}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 2.73
Relative Cost 2.0
Mechanical Properties
Young's Modulus (GPa) 80.5
Poisson's Ratio 0.247
Knoop Hardness (kgf/mm²) 507.0
Chemical Resistance
Climatic Resistance 1
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
E-FD2 Hoya 1.64769 33.84
FD2 Hoya 1.647693 33.836872
SF2 Schott 1.64769 33.85
N-SF2 Schott 1.64769 33.82
PBM22 Ohara 1.647689 33.802937
S-TIM22 Ohara 1.647689 33.792803
SF2 Sumita 1.64769 33.9
SF12 Schott 1.64831 33.841187
SF12 Sumita 1.64831 33.8
FD12 Hoya 1.648308 33.793909
Similar Glasses (CDGM)
Glass Manufacturer nd Vd Compare
ZF1 CDGM 1.647693 33.836872
H-ZF1A CDGM 1.64769 33.887993
ZF8 CDGM 1.65446 33.651201
H-F51 CDGM 1.6398 34.46457
F7 CDGM 1.636365 35.386204
H-ZF39 CDGM 1.6668 33.053728
H-ZBAF4 CDGM 1.66426 35.484251
H-F13 CDGM 1.62588 35.698971
F13 CDGM 1.625884 35.713679
F6 CDGM 1.624954 35.577816
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