ZF12 by CDGM

Obsolete Rare Environmentally Dangerous

ZF12 by CDGM is an obsolete optical glass with a rare melt frequency. It transmits from 0.38 to 2.40 µm with an nd of 1.761822 and a Vd of 26.555686. It has medium thermal expansion (CTE of 7.5×10⁻⁶/K), moderate relative cost, and dangerous environmental properties.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.4047–1.014 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.4047–1.014 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.380–2.400 µm
Optical Properties
Refractive Index (nd) 1.761822
Abbe Number (Vd) 26.555686
Dispersion Formula Schott
Wavelength Range 0.4047 — 1.014 µm
$$n(\lambda) = \sqrt{2.99507 - 0.0165673\,\lambda^2 + 0.0256701\,\lambda^{-2} + 0.00670445\,\lambda^{-4} - 0.000837477\,\lambda^{-6} + 6.26403 \times 10^{-5}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 7.5
TCE 100/300°C (10-6/K) 8.9
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[4.33 \times 10^{-6} + 2(2.64 \times 10^{-8})\,\Delta T + 3(-2.01 \times 10^{-11})\,\Delta T^2 + \frac{1.43 \times 10^{-6} + 2(1.62 \times 10^{-9})\,\Delta T}{\lambda - 0.284}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 4.64
Relative Cost 6.0
Mechanical Properties
Young's Modulus (GPa) 58.51
Poisson's Ratio 0.242
Knoop Hardness (kgf/mm²) 378.0
Chemical Resistance
Climatic Resistance —
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
PBH14W Ohara 1.761819 26.553651
PBH14 Ohara 1.761819 26.553651
FD14 Hoya 1.761823 26.552048
SF14 Schott 1.76182 26.53
N-SF14 Schott 1.76182 26.53
TIH14 Ohara 1.761821 26.517966
S-TIH14 Ohara 1.761821 26.517885
FD140 Hoya 1.76182 26.61
SF14 Sumita 1.76182 26.5
K-SFLD14 Sumita 1.76182 26.5
Similar Glasses (CDGM)
Glass Manufacturer nd Vd Compare
H-ZF12 CDGM 1.76182 26.607986
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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