Apparatus for reading-out stimulable phosphor, radiographic recording elements
US4970394A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 26, 1989 |
| Grant date | Nov 13, 1990 |
| Priority date | — |
| Expiry date | Dec 26, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01T1/2014
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
To minimize the adverse effects of "flare" in reading-out stimulable phosphor recording elements, the light-collecting face of a photodetector is provided with a multiplicity of sharp, light-transparent, optical projections. By a combination of reflections and refractions, such optical projections serve to absorb substantially all incident photons thereby preventing phosphor-stimulating photons from being reflected by the photodetector's light-collecting face and exciting non-addressed regions of the recording element. Preferably, the optical projections take the form of a sawtooth array of optical wedges; however, pyramid-shaped and cone-shaped projections are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.