Multi-modal fluorescence imaging flow cytometry system

Abstract

Aspects of the disclosure include a system for performing cytometry that can be operated in three operational modes. In one operational mode, a fluorescence image of a sample is obtained by exciting one or more fluorophore(s) with a top-hat-shaped excitation beam with a plurality of beams that are radiofrequency shifted relative to one another. In another operational mode, a sample can be illuminated successively over a time interval by a laser beam at a plurality of excitation frequencies in a scanning fashion to generate an image of the sample from the detected fluorescence. In another operational mode, the system can be operated to illuminate a plurality of locations of a sample concurrently by a single excitation frequency (e.g., a horizontal extent), which is generated, e.g., by shifting the central frequency of a laser beam by a radiofrequency and detected fluorescence is used to analyze the sample.