Normalization technique for photon-counting luminometer
US5321261A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 10, 1992 |
| Grant date | Jun 14, 1994 |
| Priority date | — |
| Expiry date | Sep 10, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01T7/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A normalization system for multi-photodetector single photon counting luminescent measuring systems and a standard for use in the same. The method comprises calculating one or more counting ratios for each photodetector in the single photon counting system and multiplying counts of unknown samples by the inverse of the appropriate counting ratio. A counting ratio for a particular photodetector is calculated by dividing the count of a standard measured by the photodetector by the count of the same standard measured by a reference photodetector. The particular standard developed employs calcium tungstate:lead as a scintillator and tritium or carbon-14 thymidine as a means of exciting the scintillator. This standard has the advantages of providing a good model of typical luminescence chemistry and producing an emission pattern which is susceptible to single photon counting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.