BSL21 by Ohara
Obsolete
Unknown
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) | 1.503779 |
|---|---|
| Abbe Number (Vd) | 66.814545 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.3 — 2.4 µm |
$$n(\lambda) = \sqrt{2.23473 - 0.00978567\,\lambda^2 + 0.00983676\,\lambda^{-2} + 0.000213984\,\lambda^{-4} - 1.45549 \times 10^{-5}\,\lambda^{-6} + 8.73937 \times 10^{-7}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 6.2 |
|---|---|
| TCE 100/300°C (10-6/K) | 7.0 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[3.189 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right]
\Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 2.46 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | — |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 1 |
| Alkali Resistance | — |
| Phosphate Resistance | 1 |
Similar Glasses (Other Manufacturers)
Similar Glasses (Ohara)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| BSL3 | Ohara | 1.498308 | 65.026785 | |
| BSL22 | Ohara | 1.518206 | 65.039654 | |
| BSL7Y | Ohara | 1.51633 | 64.243778 | |
| BSL7 | Ohara | 1.51633 | 64.150145 | |
| S-BSL7 | Ohara | 1.51633 | 64.142022 | |
| L-BSL7 | Ohara | 1.51633 | 64.065129 | |
| BSL1 | Ohara | 1.510091 | 63.635037 | |
| S-APL | Ohara | 1.517277 | 69.56319 | |
| S-APL1 | Ohara | 1.517277 | 69.563209 | |
| APL1 | Ohara | 1.517277 | 69.563209 |