PBM3 by Ohara
Obsolete
Unknown
Environmentally Dangerous
PBM3 by Ohara is an obsolete optical glass. It transmits from 0.32 to 2.40 µm with an nd of 1.612929 and a Vd of 36.994096. It has medium thermal expansion (CTE of 8.3×10⁻⁶/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
Thermal Properties
| TCE -30/70°C (10-6/K) | 8.3 |
|---|---|
| TCE 100/300°C (10-6/K) | 9.5 |
| Thermal Conductivity (W/mK) | — |
| Heat Capacity (J/gK) | — |
$$\frac{dn}{dT} = \frac{n_0^2 - 1}{2\,n_0}\left[5.292 \times 10^{-6} + 2(0)\,\Delta T + 3(0)\,\Delta T^2 + \frac{0 + 2(0)\,\Delta T}{\lambda - 0}\right]
\Delta T = T - T_0, \quad T_0 = 25\,°\text{C}$$
Chemical Resistance
| Climatic Resistance | — |
|---|---|
| Stain Resistance | — |
| Acid Resistance | 1 |
| Alkali Resistance | — |
| Phosphate Resistance | 2 |
Similar Glasses (Other Manufacturers)
| Glass | Manufacturer | nd | Vd | Compare |
|---|---|---|---|---|
| F2 | CDGM | 1.612929 | 36.986002 | |
| H-F2 | CDGM | 1.61293 | 37.004441 | |
| F3 | Hoya | 1.612929 | 36.964515 | |
| E-F3 | Hoya | 1.61293 | 36.96 | |
| F3 | Schott | 1.612931 | 37.038954 | |
| F3 | Sumita | 1.61293 | 36.9 | |
| H-F3 | CDGM | 1.61659 | 36.651688 | |
| F4 | Schott | 1.616592 | 36.628072 | |
| F3 | CDGM | 1.616592 | 36.627394 | |
| F4 | Hoya | 1.616589 | 36.615561 |
Similar Glasses (Ohara)
| Glass | Manufacturer | nd | Vd | Compare |
|---|---|---|---|---|
| S-TIM3 | Ohara | 1.612929 | 37.005342 | |
| PBM4 | Ohara | 1.616588 | 36.632973 | |
| PBM2Y | Ohara | 1.620041 | 36.269263 | |
| S-TIM2 | Ohara | 1.620041 | 36.263378 | |
| PBM2 | Ohara | 1.620041 | 36.256658 | |
| PBM9 | Ohara | 1.620451 | 38.119955 | |
| PBM11 | Ohara | 1.620955 | 35.880852 | |
| TIM11 | Ohara | 1.620955 | 35.880852 | |
| PBM5 | Ohara | 1.60342 | 38.012915 | |
| S-TIM5 | Ohara | 1.60342 | 38.027347 |