H-ZBAF20 by CDGM

Preferred Common Environmentally Friendly

H-ZBAF20 by CDGM is a preferred optical glass with a common melt frequency. It transmits from 0.35 to 2.40 µm with an nd of 1.70154 and a Vd of 41.148468. It has medium thermal expansion (CTE of 6.9×10⁻⁶/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: 0.350–2.400 µm
Optical Properties
Refractive Index (nd) 1.70154
Abbe Number (Vd) 41.148468
Dispersion Formula Sellmeier
Wavelength Range 0.365 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{0.155463\,\lambda^2}{\lambda^2 - 0.0500497} + \frac{1.22205\,\lambda^2}{\lambda^2 - 119.802} + \frac{1.66612\,\lambda^2}{\lambda^2 - 0.0102206}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 6.9
TCE 100/300°C (10-6/K) 8.5
Thermal Conductivity (W/mK) 0.707
Heat Capacity (J/gK) 0.498
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[2.21 \times 10^{-6} + 2(1.68 \times 10^{-8})\,\Delta T + 3(-1.66 \times 10^{-11})\,\Delta T^2 + \frac{8.01 \times 10^{-7} + 2(3.97 \times 10^{-10})\,\Delta T}{\lambda - 0.22}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.64
Relative Cost 2.8
Mechanical Properties
Young's Modulus (GPa) 96.79
Poisson's Ratio 0.267
Knoop Hardness (kgf/mm²) 594.0
Chemical Resistance
Climatic Resistance 1
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
BAFD7 Hoya 1.70154 41.15
BASF7 Sumita 1.70154 41.1
D01-41 Corning 1.701805 41.110216
BAH77 Ohara 1.701539 41.21001
S-BAH27 Ohara 1.701536 41.23944
BAH27 Ohara 1.701536 41.242277
BASF52 Schott 1.70181 41.010234
BAFD15 Hoya 1.701999 40.195943
BAH71 Ohara 1.701998 40.097173
S-BAH54 Ohara 1.695 42.167111
Similar Glasses (CDGM)
Glass Manufacturer nd Vd Compare
H-LAF62 CDGM 1.72 43.680739
D-LAF79-25 CDGM 1.72986 40.497566
D-LAF79 CDGM 1.73077 40.508021
ZBAF51 CDGM 1.682726 44.528543
H-ZBAF21 CDGM 1.72341 37.991564
ZBAF17 CDGM 1.667554 41.957211
H-TF5 CDGM 1.6541 39.539424
H-LAF3B CDGM 1.744 44.900027
H-TF8 CDGM 1.72046 34.757746
H-LAF51 CDGM 1.7 48.079839
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