Fluorescent screen, x-ray detector, and x-ray inspection apparatus
US11181649B2 · kind B2 · utility
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18References
9Claims
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Key dates
| Filing date | Mar 17, 2020 |
| Grant date | Nov 23, 2021 |
| Priority date | — |
| Expiry date | Mar 17, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG21K2004/08
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fluorescent screen is configured to convert an X-ray into visible light to one embodiment. The screen includes a gadolinium oxysulfide phosphor activated with praseodymium and cerium. The phosphor contains praseodymium having a concentration of 0.01 mass % or more and 0.3 mass % or less and cerium having a concentration of 5 ppm or more and 30 ppm or less. An average particle diameter of the phosphor is 10 μm or more and 20 μm or less. A weight per unit area of the phosphor is 270 mg/cm2 or more and 380 mg/cm2 or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.