Radiation-resistant optical glass PBM2R
04.18.2025
PBM2R is a radiation-resistant optical glass with a medium refractive index and high dispersion range that greatly suppresses coloration and transmittance loss due to irradiation.
It can be used as optical components in strong radiation environments such as outer space.
| PBM2R
(New Product) |
||
| Coloring (Before irradiation) |
λ80 | 445 |
| λ5 | 380 | |
| Coloring (After irradiation of 2.0 MGy of gamma rays *Note) |
λ80 | 466 |
| λ5 | 390 | |
| Refractive Index nd | 1.62004 | |
| Abbe Number νd | 36.41 | |
| CTE α (10-7 K-1) |
-30～70℃ | 84 |
| +100～300℃ | 98 | |
| Transformation Point Tg Tg(℃) | 441 | |
| Yield Point At At(℃) | 485 | |
| Chemical Resistance | RW(P) | 1 |
| RA(P) | 1 | |
| W(S) | 2 | |
| SR | 1.0 | |
| PR | 2.0 | |
| Specific Gravity | 3.59 | |
| Knoop Hardness Hk | 410〔4〕 | |
| Abrasion Aa | 169 | |
| Detailed Catalog Data | ||
（Please consult us about product form of supply, available shapes, sizes and tolerances.）
*Note: These are reference values.