PBM2Y by Ohara
Standard
Unknown
i-line
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) | 1.620041 |
|---|---|
| Abbe Number (Vd) | 36.269263 |
| Dispersion Formula | Sellmeier |
| Wavelength Range | 0.326106 — 2.32542 µm |
$$n(\lambda) = \sqrt{1 + \frac{1.39447\,\lambda^2}{\lambda^2 - 0.0110572} + \frac{0.159231\,\lambda^2}{\lambda^2 - 0.0507195} + \frac{0.24547\,\lambda^2}{\lambda^2 - 31.444}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 8.7 |
|---|---|
| TCE 100/300°C (10-6/K) | 9.7 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[1.2 \times 10^{-6} + 2(1.69 \times 10^{-8})\,\Delta T + 3(-3.38 \times 10^{-11})\,\Delta T^2 + \frac{9.77 \times 10^{-7} + 2(7.43 \times 10^{-10})\,\Delta T}{\lambda - 0.243}\right]
\Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Physical Properties
| Density (g/cm³) | 3.61 |
|---|---|
| Relative Cost | — |
Mechanical Properties
| Young's Modulus (GPa) | — |
|---|---|
| Poisson's Ratio | — |
| Knoop Hardness (kgf/mm²) | — |
Chemical Resistance
| Climatic Resistance | 1 |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 1 |
| Alkali Resistance | — |
| Phosphate Resistance | 2 |
Notes
Improved XMT at 365
Similar Glasses (Other Manufacturers)
Similar Glasses (Ohara)
| Glass | Manufacturer | nd | Vd | |
|---|---|---|---|---|
| S-TIM2 | Ohara | 1.620041 | 36.263378 | |
| PBM2 | Ohara | 1.620041 | 36.256658 | |
| PBM11 | Ohara | 1.620955 | 35.880852 | |
| TIM11 | Ohara | 1.620955 | 35.880852 | |
| PBM4 | Ohara | 1.616588 | 36.632973 | |
| PBM1 | Ohara | 1.625882 | 35.700668 | |
| S-TIM1 | Ohara | 1.625882 | 35.699614 | |
| PBM3 | Ohara | 1.612929 | 36.994096 | |
| S-TIM3 | Ohara | 1.612929 | 37.005342 | |
| PBM9 | Ohara | 1.620451 | 38.119955 |