H-BAF3 by CDGM

Standard Rare Environmentally Friendly

H-BAF3 by CDGM is a standard optical glass with a rare melt frequency. It transmits from 0.33 to 2.40 µm with an nd of 1.57957 and a Vd of 53.711637. It has medium thermal expansion (CTE of 6.7×10⁻⁶/K), excellent chemical resistance, and moderate 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: 0.330–2.400 µm
Optical Properties
Refractive Index (nd) 1.57957
Abbe Number (Vd) 53.711637
Dispersion Formula Sellmeier
Wavelength Range 0.365 — 2.325 µm
$$n(\lambda) = \sqrt{1 + \frac{1.16102\,\lambda^2}{\lambda^2 - 0.00637009} + \frac{0.926012\,\lambda^2}{\lambda^2 - 107.342} + \frac{0.290936\,\lambda^2}{\lambda^2 - 0.0265573}}$$
Thermal Properties
TCE -30/70°C (10-6/K) 6.7
TCE 100/300°C (10-6/K) 8.4
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[3.14 \times 10^{-6} + 2(1.83 \times 10^{-8})\,\Delta T + 3(-3.7 \times 10^{-11})\,\Delta T^2 + \frac{5.37 \times 10^{-7} + 2(7.04 \times 10^{-10})\,\Delta T}{\lambda - 0.22}\right] \Delta T = T - T_0, \quad T_0 = 20\,°\text{C}$$
Physical Properties
Density (g/cm³) 3.14
Relative Cost 6.1
Mechanical Properties
Young's Modulus (GPa) 76.19
Poisson's Ratio 0.269
Knoop Hardness (kgf/mm²) 523.0
Chemical Resistance
Climatic Resistance 1
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
BALF4 Schott 1.579569 53.708241
BAFL4 Hoya 1.579572 53.705963
N-BALF4 Schott 1.57956 53.87
BALF3 Sumita 1.57135 53.0
BAFL3 Hoya 1.571348 52.982526
BAL3 Ohara 1.571351 52.968158
S-BAL3 Ohara 1.571351 52.952106
BALF6 Sumita 1.58904 53.2
BAFL6 Hoya 1.589036 52.935166
ADF1 Hoya 1.564997 52.958253
Similar Glasses (CDGM)
Glass Manufacturer nd Vd Compare
H-BAK7 CDGM 1.56883 56.041308
H-BAK7GT CDGM 1.56883 56.041308
H-BAK7A CDGM 1.568828 56.127804
H-BAK8 CDGM 1.5725 57.486797
H-BAF2 CDGM 1.5697 49.452646
BAF2 CDGM 1.569703 49.435926
H-ZK5 CDGM 1.61117 55.772437
H-ZK50GT CDGM 1.60738 56.654511
H-ZK50 CDGM 1.60738 56.654511
H-ZK8 CDGM 1.61405 55.116283
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