BAF4 by Hoya

Obsolete Unknown Environmentally Dangerous

BAF4 by Hoya is an obsolete optical glass. It transmits from 0.33 to 2.33 µm with an nd of 1.60562 and a Vd of 43.87626. It has dangerous environmental properties.

Refractive Index vs Wavelength
Refractive Index Calculator
Valid range: 0.334–2.325 µm
dn/dλ vs Wavelength
dn/dλ Calculator
Valid range: 0.334–2.325 µm
Abbe Number Calculator
Transmission vs Wavelength

No transmission data available.

Transmission Calculator
Valid wavelength range: 0.334–2.325 µm
Optical Properties
Refractive Index (nd) 1.60562
Abbe Number (Vd) 43.87626
Dispersion Formula Schott
Wavelength Range 0.334 — 2.325 µm
$$n(\lambda) = \sqrt{2.52418 - 0.0094636\,\lambda^2 + 0.017352\,\lambda^{-2} + 0.00095314\,\lambda^{-4} - 6.07776 \times 10^{-5}\,\lambda^{-6} + 4.60672 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
TCE -30/70°C (10-6/K) —
TCE 100/300°C (10-6/K) —
Thermal Conductivity (W/mK) —
Heat Capacity (J/gK) —
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[0 + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right] \Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
Density (g/cm³) —
Relative Cost —
Mechanical Properties
Young's Modulus (GPa) —
Poisson's Ratio —
Knoop Hardness (kgf/mm²) —
Chemical Resistance
Climatic Resistance —
Stain Resistance —
Acid Resistance —
Alkali Resistance —
Phosphate Resistance —
Similar Glasses (Other Manufacturers)
Glass Manufacturer nd Vd Compare
H-BAF5 CDGM 1.60562 43.875621
BAF5 CDGM 1.605623 43.890292
BAF4 Sumita 1.60562 43.9
BAF4 Schott 1.605621 43.929699
C06-44 Corning 1.605608 43.942859
BAM4 Ohara 1.60562 43.723021
N-BAF4 Schott 1.60568 43.72
S-BAM4 Ohara 1.60562 43.706978
TF3 CDGM 1.612423 44.093486
BPM4 Ohara 1.6134 43.841533
Similar Glasses (Hoya)
Glass Manufacturer nd Vd Compare
M-BAF41 Hoya 1.605777 43.98709
E-ADF10 Hoya 1.6131 44.36
ADF10 Hoya 1.613102 44.361138
ADF40 Hoya 1.6134 44.290061
LAF45 Hoya 1.61396 44.29
ADF4 Hoya 1.612498 44.873885
BAFD5 Hoya 1.603232 42.391075
BAFD16 Hoya 1.6 42.456745
BAF7 Hoya 1.608013 46.212035
BAFD3 Hoya 1.607171 40.359687
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