PBM5 by Ohara
Obsolete
Unknown
Environmentally Dangerous
PBM5 by Ohara is an obsolete optical glass. It transmits from 0.32 to 0.70 µm with an nd of 1.60342 and a Vd of 38.012915. It has medium thermal expansion (CTE of 8.8×10⁻⁶/K), good chemical resistance, and dangerous environmental properties.
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) | 1.60342 |
|---|---|
| Abbe Number (Vd) | 38.012915 |
| Dispersion Formula | Schott |
| Wavelength Range | 0.3 — 2.4 µm |
$$n(\lambda) = \sqrt{2.50784 - 0.00894715\,\lambda^2 + 0.0204695\,\lambda^{-2} + 0.000891145\,\lambda^{-4} - 3.63126 \times 10^{-5}\,\lambda^{-6} + 4.54779 \times 10^{-6}\,\lambda^{-8}}$$
Thermal Properties
| TCE -30/70°C (10-6/K) | 8.8 |
|---|---|
| TCE 100/300°C (10-6/K) | 9.8 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[3.756 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right]
\Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Chemical Resistance
| Climatic Resistance | — |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 1 |
| Alkali Resistance | — |
| Phosphate Resistance | 2 |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | Compare |
|---|---|---|---|---|
| F1 | CDGM | 1.603417 | 38.01487 | |
| F5 | Hoya | 1.603417 | 38.014872 | |
| H-F1 | CDGM | 1.60342 | 38.010877 | |
| E-F5 | Hoya | 1.60342 | 38.01 | |
| F5 | Sumita | 1.60342 | 38.0 | |
| F5 | Schott | 1.60342 | 38.03 | |
| C04-38 | Corning | 1.603499 | 38.110538 | |
| F15 | Hoya | 1.605651 | 37.899711 | |
| F14 | Schott | 1.601401 | 38.231923 | |
| F15 | Schott | 1.605651 | 37.830856 |
Similar Glasses (Ohara)
| Glass | Manufacturer | nd | Vd | Compare |
|---|---|---|---|---|
| S-TIM5 | Ohara | 1.60342 | 38.027347 | |
| PBM18Y | Ohara | 1.595509 | 38.767114 | |
| PBM8 | Ohara | 1.595508 | 39.213424 | |
| S-TIM8 | Ohara | 1.595509 | 39.242273 | |
| S-TIM3 | Ohara | 1.612929 | 37.005342 | |
| PBM3 | Ohara | 1.612929 | 36.994096 | |
| PBM8Y | Ohara | 1.595509 | 39.260208 | |
| PBM4 | Ohara | 1.616588 | 36.632973 | |
| BAM23 | Ohara | 1.607167 | 40.26316 | |
| PBM9 | Ohara | 1.620451 | 38.119955 |