ZF13 by CDGM

Obsolete Rare Environmentally Dangerous

ZF13 by CDGM is an obsolete optical glass with a rare melt frequency. It transmits from 0.37 to 2.40 µm with an nd of 1.784724 and a Vd of 25.754051. It has medium thermal expansion (CTE of 7.8×10⁻⁶/K), excellent chemical resistance, 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: 0.370–2.400 µm
Optical Properties
Refractive Index (nd) 1.784724
Abbe Number (Vd) 25.754051
Dispersion Formula Schott
Wavelength Range 0.4047 — 1.014 µm
$$n(\lambda) = \sqrt{3.06161 - 0.0145895\,\lambda^2 + 0.0328147\,\lambda^{-2} + 0.0052399\,\lambda^{-4} - 0.000560505\,\lambda^{-6} + 4.64234 \times 10^{-5}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 7.8
TCE 100/300°C (10-6/K) 9.6
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[3.7 \times 10^{-6} + 2(2.35 \times 10^{-8})\,\Delta T + 3(-1.53 \times 10^{-10})\,\Delta T^2 + \frac{1.59 \times 10^{-6} + 2(6.42 \times 10^{-10})\,\Delta T}{\lambda - 0.278}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 4.87
Relative Cost 4.3
Mechanical Properties
Young's Modulus (GPa) 57.33
Poisson's Ratio 0.246
Knoop Hardness (kgf/mm²) 390.0
Chemical Resistance
Climatic Resistance 1
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
SF11 Schott 1.78472 25.76
FD110 Hoya 1.78472 25.72
PBH11 Ohara 1.784718 25.712726
PBH11W Ohara 1.784718 25.712726
D85-25 Corning 1.784752 25.799504
FD11 Hoya 1.784715 25.704276
SF11 Sumita 1.78472 25.7
SF11W Sumita 1.78472 25.7
S-TIH11 Ohara 1.784723 25.683446
N-SF11 Schott 1.78472 25.68
Similar Glasses (CDGM)
Glass Manufacturer nd Vd Compare
H-ZF13 CDGM 1.78472 25.720045
H-ZF13GT CDGM 1.78472 25.720045
ZF51 CDGM 1.784701 26.075871
ZF7LGT CDGM 1.80519 25.471232
ZF7L CDGM 1.80519 25.471232
ZF7LTT CDGM 1.80519 25.471232
H-ZF7LA CDGM 1.80518 25.456256
H-ZF7LAGT CDGM 1.80518 25.456256
ZF7 CDGM 1.806277 25.380144
ZF12 CDGM 1.761822 26.555686
Compare Glasses
    Compare Selected