Patent ID: 7248360

Claim:
A system for performing laser scanning of a liquid sample containing particles, the system comprising: (a) means for scanning an excitation laser beam from an excitation laser across the sample; (b) means for focusing the excitation laser beam into the sample; (c) means for collecting a light emitted from the sample and its constituents in response to the excitation laser beam; (d) means for de-scanning the collected emission light; (e) means for spectrally dispersing the collected emission light; (f) means for imaging the spectrally dispersed emission light as a spectrum; (g) means for detecting the spectrum in one or more detection channels simultaneously according to its wavelength using a two-dimensional detector surface; and (h) at least one afocal lens pair in a beam path of the collected emission light between a dichroic mirror and the means for spectrally dispersing.