PBM4 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) | 1.616588 |
|---|---|
| Abbe Number (Vd) | 36.632973 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.3 — 2.4 µm |
$$n(\lambda) = \sqrt{2.54637 - 0.00934463\,\lambda^2 + 0.0214622\,\lambda^{-2} + 0.00105199\,\lambda^{-4} - 4.85042 \times 10^{-5}\,\lambda^{-6} + 5.61837 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 8.6 |
|---|---|
| TCE 100/300°C (10-6/K) | 9.5 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[3.862 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right]
\Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 3.58 |
|---|---|
| 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 | |
|---|---|---|---|---|
| PBM2Y | Ohara | 1.620041 | 36.269263 | |
| S-TIM2 | Ohara | 1.620041 | 36.263378 | |
| PBM2 | Ohara | 1.620041 | 36.256658 | |
| PBM3 | Ohara | 1.612929 | 36.994096 | |
| S-TIM3 | Ohara | 1.612929 | 37.005342 | |
| TIM11 | Ohara | 1.620955 | 35.880852 | |
| PBM11 | Ohara | 1.620955 | 35.880852 | |
| PBM1 | Ohara | 1.625882 | 35.700668 | |
| S-TIM1 | Ohara | 1.625882 | 35.699614 | |
| PBM9 | Ohara | 1.620451 | 38.119955 |