BACD4 by Hoya
Special
Very Rare
Environmentally Dangerous
Refractive Index vs Wavelength
Refractive Index Calculator
dn/dλ vs Wavelength
dn/dλ Calculator
Abbe Number Calculator
Transmission vs Wavelength
Transmission Calculator
Optical Properties
| Refractive Index (nd) | 1.61272 |
|---|---|
| Abbe Number (Vd) | 58.58 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.36501 — 1.5296 µm |
$$n(\lambda) = \sqrt{2.55846 - 0.00974573\,\lambda^2 + 0.0151105\,\lambda^{-2} + 0.000232733\,\lambda^{-4} + 1.11372 \times 10^{-6}\,\lambda^{-6} + 1.64248 \times 10^{-7}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 6.6 |
|---|---|
| TCE 100/300°C (10-6/K) | 7.7 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[2.40941 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right]
\Delta T = T - T_0, \quad T_0 = 23\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 3.58 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 2 |
|---|---|
| Stain Resistance | 4 |
| Acid Resistance | 4 |
| Alkali Resistance | — |
| Phosphate Resistance | — |
Notes
Not in a position to accept new order because of discontinuation.
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| H-ZK6 | CDGM | 1.61272 | 58.577083 | |
| C13-58 | Corning | 1.612693 | 58.570371 | |
| SK4 | Sumita | 1.61272 | 58.6 | |
| K-SK4 | Sumita | 1.61272 | 58.6 | |
| SK4 | Schott | 1.61272 | 58.629829 | |
| N-SK4 | Schott | 1.61272 | 58.63 | |
| S-BSM4 | Ohara | 1.612716 | 58.716945 | |
| BSM4 | Ohara | 1.612716 | 58.749129 | |
| K-PSK200(M) | Sumita | 1.61083 | 58.9 | |
| K-PSK200 | Sumita | 1.61305 | 59.0 |
Similar Glasses (Hoya)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| BACD3 | Hoya | 1.608812 | 58.863994 | |
| BACD7 | Hoya | 1.607292 | 59.474776 | |
| M-BACD15 | Hoya | 1.62263 | 58.17 | |
| MP-BACD15 | Hoya | 1.62263 | 58.17 | |
| BACD15 | Hoya | 1.62299 | 58.12 | |
| BACD1 | Hoya | 1.610248 | 56.650958 | |
| BACD2 | Hoya | 1.60738 | 56.72 | |
| BACD16 | Hoya | 1.62041 | 60.35 | |
| E-BACD10 | Hoya | 1.6228 | 56.91 | |
| BACD10 | Hoya | 1.622799 | 56.906336 |