Fluorescence intensity and lifetime distribution analysis
US6690463B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 9, 2001 |
| Grant date | Feb 10, 2004 |
| Priority date | — |
| Expiry date | Feb 9, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2015/0216
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention relates to a method for characterizing samples having fluorescent particles, comprising the steps of:exciting particles in a measurement volume to emit fluorescence by a series of excitation pulses,monitoring the emitted fluorescence by detecting sequences of photon counts using a detector,determining numbers of photon counts in counting time intervals of given width,determining in the counting time intervals detection delay times of the photon counts relative to the corresponding excitation pulses,determining a function of the detection delay times,determining a probability function of at least two arguments, {circumflex over (P)}(n, t, . . . ), wherein at least one argument is the number of photon counts and another argument is the function of detection delay times, anddetermining from the probability function {circumflex over (P)}(n, t, . . . ) a distribution of particles as a function of at least two arguments, wherein one argument is a specific brightness of the particles, or a measure thereof, and another argument is a fluorescence lifetime of the particles, or a measure thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.