BAC5 by Hoya

Obsolete Unknown Environmentally Dangerous

BAC5 by Hoya is an obsolete optical glass. It transmits from 0.33 to 2.33 µm with an nd of 1.556708 and a Vd of 58.562365. 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) 1.556708
Abbe Number (Vd) 58.562365
Dispersion Formula Schott
Wavelength Range 0.334 — 2.325 µm
$$n(\lambda) = \sqrt{2.38924 - 0.00992035\,\lambda^2 + 0.0109101\,\lambda^{-2} + 0.000996593\,\lambda^{-4} - 0.000120095\,\lambda^{-6} + 6.84018 \times 10^{-6}\,\lambda^{-8}}$$
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
BAK5 Schott 1.556709 58.649202
BAL15Y Ohara 1.556711 58.679177
BAL15 Ohara 1.556711 58.689461
H-BAK5 CDGM 1.56069 58.344731
BAK50 Schott 1.567736 57.990411
K-SKLD300(M) Sumita 1.56124 60.1
K-SKLD300 Sumita 1.5642 60.4
BAL11 Ohara 1.572501 57.760854
S-BAL11 Ohara 1.572501 57.74298
S-BAL41 Ohara 1.563839 60.666575
Similar Glasses (Hoya)
Glass Manufacturer nd Vd Compare
BAC1 Hoya 1.572497 57.488684
BACD11 Hoya 1.56384 60.83
BAC2 Hoya 1.539961 59.721586
BAC4 Hoya 1.56883 56.04
ZNC1 Hoya 1.533149 58.063515
BAC6 Hoya 1.574441 56.357089
BACD12 Hoya 1.583129 59.459639
MC-BACD12 Hoya 1.58313 59.46
MP-BACD12 Hoya 1.58313 59.46
M-BACD12 Hoya 1.58313 59.46
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