Tailored optical interface for scintillation camera detector
US5763887A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 2, 1996 |
| Grant date | Jun 9, 1998 |
| Priority date | — |
| Expiry date | Aug 2, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B6/4258
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A scintillation camera detector head comprises a scintillation crystal, a plurality of photomultiplier tubes (PMTs) optically coupled to the scintillation crystal, and a diffractive surface, such as a holographic optical element (HOE), optically coupled to the scintillation crystal. The diffractive surface preferentially reflects or redirects light from a scintillation event which impinges upon the surface toward one or more predetermined PMTs as a function of the angle of incidence or the location of the event. Light emitted under a peak PMT can be preferentially reflected or transmitted away from the peak PMT and toward the surrounding PMTs to reduce spatial resolution modulation. Alternatively, light impinging on the surface from an event can be directed toward the peak PMT and away from surrounding PMTs to achieve greater isolation of events.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.