H-ZF1A by CDGM

Preferred Very Common Environmentally Friendly

H-ZF1A 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 33.887993. 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) 1.64769
Abbe Number (Vd) 33.887993
Dispersion Formula Sellmeier
Wavelength Range 0.365 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{0.157527\,\lambda^2}{\lambda^2 - 0.0585467} + \frac{1.47923\,\lambda^2}{\lambda^2 - 0.0111805} + \frac{1.18166\,\lambda^2}{\lambda^2 - 115.154}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 8.5
TCE 100/300°C (10-6/K) 10.3
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-2.07 \times 10^{-6} + 2(1.38 \times 10^{-8})\,\Delta T + 3(-4.21 \times 10^{-11})\,\Delta T^2 + \frac{7.78 \times 10^{-7} + 2(1.01 \times 10^{-9})\,\Delta T}{\lambda - 0.278}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 2.79
Relative Cost 1.6
Mechanical Properties
Young's Modulus (GPa) 82.62
Poisson's Ratio 0.237
Knoop Hardness (kgf/mm²) 523.0
Chemical Resistance
Climatic Resistance 1
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
SF2 Sumita 1.64769 33.9
SF2 Schott 1.64769 33.85
E-FD2 Hoya 1.64769 33.84
FD2 Hoya 1.647693 33.836872
N-SF2 Schott 1.64769 33.82
C48-34 Corning 1.647992 33.943274
PBM22 Ohara 1.647689 33.802937
S-TIM22 Ohara 1.647689 33.792803
SF12 Schott 1.64831 33.841187
SF12 Sumita 1.64831 33.8
Similar Glasses (CDGM)
Glass Manufacturer nd Vd Compare
H-ZF1 CDGM 1.64769 33.840317
ZF1 CDGM 1.647693 33.836872
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
Compare Glasses
    Compare Selected