The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 06, 1998
Filed:
Mar. 17, 1997
Salvador M Fernandez, Hartford, CT (US);
Ernest St Louis, Manchester, CT (US);
Ralph Levy, West Hartford, CT (US);
Ernest F Gulgon, Canton, CT (US);
Sean Cobane, Norwich, CT (US);
Ciencia, Inc., East Hartford, CT (US);
Abstract
A phase fluorometer employs a baseband frequency generator to generate a sample baseband signal at a first frequency f.sub.o and a reference signal correlated to the sample baseband signal. A second signal generator generates a carrier signal having a second frequency f. The sample baseband signal and the carrier signal are combined to form an up-converted sample signal having a frequency f.+-.f.sub.o. A light source is modulated at the up-converted sample signal frequency f.+-.f.sub.o to illuminate a sample. A photo detector detects fluorescence emissions from a sample excited by the excitation light and converts the emission into a fluorescence signal. A down-converter combines the carrier signal and fluorescence signal to form a phase-shifted and down-converted sample signal. A processor digitally processes the phase-shifted and demodulated sample signal and the reference signal to determine the fluorescence lifetime.