Measurement of luminescence
AssigneeThe University of Salford
InventorChristopher G. Morgan
Life of this patent
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Abstract
Apparatus for producing decay time weighted information (e.g. a decay time weighted image) of a luminescent sample, comprises an excitation light source arranged to illuminate the sample, means for modulating or pulsing the intensity of the excitation light in a predetermined cyclical manner, detector means for detecting photons emitted by the sample as a result of luminescence, means for storing data representative of detected photons, the stored data being weighted as a function of phase difference between detection of photons and the cyclically varying modulation, and means for producing decay time weighted information from the stored data.
Claims20
Apparatus for producing decay time weighted information of a luminescent sample, comprising:
- an excitation light source arranged to illuminate the sample;
- means for modulating the intensity of the excitation light in a predetermined cyclical manner;
- detector means for detecting photons emitted by the sample as a result of luminescence;
- means for storing data representative of detected photons, the stored data being weighted as a function of phase difference between detection of photons and the cyclically varing modulation;
- and
- means for producing decay time weighted information from the stored data wherein the weighted stored data is obtained using first and second reference signals each varying in the predetermined cyclical manner and having a known phase shift relative to each other.
Apparatus for producing decay time weighted information of a luminescent sample, comprising:
- an excitation light source arranged to illuminate the sample;
- means for pulsing the intensity of the excitation light in a predetermined cyclical manner;
- detector means for detecting photons emitted by the sample as a result of luminescences;
- means for storing data representative of detected photons, the stored data being weighted as a function of phase difference between detection of photons and the cyclically varying modulation;
- and
- means for producing decay time weighted information from the stored data.
Dependencies are inferred from the claim text.