ZBAF51 by CDGM

Obsolete Rare Environmentally Dangerous

ZBAF51 by CDGM is an obsolete optical glass with a rare melt frequency. It transmits from 0.34 to 2.40 µm with an nd of 1.682726 and a Vd of 44.528543. It has medium thermal expansion (CTE of 7.8×10⁻⁶/K), moderate relative cost, and dangerous environmental properties.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.365–1.014 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.365–1.014 µm
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Valid wavelength range: 0.340–2.400 µm
Optical Properties
Refractive Index (nd) 1.682726
Abbe Number (Vd) 44.528543
Dispersion Formula Schott
Wavelength Range 0.365 — 1.014 µm
$$n(\lambda) = \sqrt{2.75902 - 0.00581805\,\lambda^2 + 0.0266099\,\lambda^{-2} - 0.00075486\,\lambda^{-4} + 0.000176405\,\lambda^{-6} - 6.72712 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 7.8
TCE 100/300°C (10-6/K) 8.9
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[-1.51 \times 10^{-6} + 2(1.79 \times 10^{-8})\,\Delta T + 3(-4.04 \times 10^{-11})\,\Delta T^2 + \frac{7.85 \times 10^{-7} + 2(6.9 \times 10^{-11})\,\Delta T}{\lambda - 0.221}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 4.14
Relative Cost 3.7
Mechanical Properties
Young's Modulus (GPa) 78.32
Poisson's Ratio 0.282
Knoop Hardness (kgf/mm²) 464.0
Chemical Resistance
Climatic Resistance —
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
BAF50 Schott 1.682726 44.503507
K-BaFn1 Sumita 1.6825 44.5
BAFN1 Sumita 1.6825 44.5
BAF22 Hoya 1.682496 44.671672
IRG11 Generic IR 1.680932 44.434326
BAF20 Hoya 1.685777 43.901833
ADF8 Hoya 1.686498 42.863902
BAF13 Hoya 1.668916 44.911265
BAF13 Schott 1.668919 44.961828
BAH13 Ohara 1.668921 44.987354
Similar Glasses (CDGM)
Glass Manufacturer nd Vd Compare
H-ZBAF52 CDGM 1.67003 47.19506
H-ZBAF5 CDGM 1.67103 47.288963
ZBAF17 CDGM 1.667554 41.957211
H-ZBAF20 CDGM 1.70154 41.148468
H-LAF51 CDGM 1.7 48.079839
H-ZBAF16 CDGM 1.66672 48.421731
H-LAF1 CDGM 1.69362 49.193837
H-LAF62 CDGM 1.72 43.680739
H-LAF2 CDGM 1.717 47.888609
H-TF5 CDGM 1.6541 39.539424
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