H-ZF12 by CDGM

Preferred Common Environmentally Friendly

H-ZF12 by CDGM is a preferred optical glass with a common melt frequency. It transmits from 0.37 to 2.40 µm with an nd of 1.76182 and a Vd of 26.607986. It has medium thermal expansion (CTE of 8.4×10⁻⁶/K), excellent chemical resistance, and moderate relative cost.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.4047–2.325 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.4047–2.325 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.370–2.400 µm
Optical Properties
Refractive Index (nd) 1.76182
Abbe Number (Vd) 26.607986
Dispersion Formula Sellmeier
Wavelength Range 0.4047 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{0.32373\,\lambda^2}{\lambda^2 - 0.0598308} + \frac{1.65669\,\lambda^2}{\lambda^2 - 0.0120543} + \frac{2.12142\,\lambda^2}{\lambda^2 - 174.188}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 8.4
TCE 100/300°C (10-6/K) 10.1
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-3.47 \times 10^{-6} + 2(1.41 \times 10^{-8})\,\Delta T + 3(-2.09 \times 10^{-11})\,\Delta T^2 + \frac{8.94 \times 10^{-7} + 2(1.27 \times 10^{-9})\,\Delta T}{\lambda - 0.3}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.17
Relative Cost 4.6
Mechanical Properties
Young's Modulus (GPa) 90.06
Poisson's Ratio 0.247
Knoop Hardness (kgf/mm²) 538.0
Chemical Resistance
Climatic Resistance 1
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
FD140 Hoya 1.76182 26.61
PBH14W Ohara 1.761819 26.553651
PBH14 Ohara 1.761819 26.553651
FD14 Hoya 1.761823 26.552048
N-SF14 Schott 1.76182 26.53
SF14 Schott 1.76182 26.53
TIH14 Ohara 1.761821 26.517966
S-TIH14 Ohara 1.761821 26.517885
SF14 Sumita 1.76182 26.5
K-SFLD14 Sumita 1.76182 26.5
Similar Glasses (CDGM)
Glass Manufacturer nd Vd Compare
ZF12 CDGM 1.761822 26.555686
H-ZF6 CDGM 1.7552 27.530047
ZF6 CDGM 1.755205 27.546239
H-ZF50 CDGM 1.74077 27.760063
ZF50 CDGM 1.74077 27.76788
ZF51 CDGM 1.784701 26.075871
ZF13 CDGM 1.784724 25.754051
H-ZF13GT CDGM 1.78472 25.720045
H-ZF13 CDGM 1.78472 25.720045
ZF5 CDGM 1.739999 28.245048
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