Patent ID: 7385682

Claim:
A cytometer, comprising: an illuminating unit comprising a laser and a light beam shaping module for shaping and converging a laser light beam emitted from the laser, so that the light beam irradiates a sample to be detected; a sample generation unit comprising a gas-liquid transmission controlling module and a flow chamber which are connected to each other, so that a sample liquid containing cells to be detected may flow through the flow chamber while being encircled by a sheath fluid; and a signal processing unit, comprising at least a photoelectric detection module, for receiving, photoelectrically converting and correspondingly processing scattering light emitted from the flow chamber; wherein the light beam shaping module comprises at least one aspheric collimating lens with a large numerical aperture and a pair of mutually crossing cylindrical lenses, the pair of mutually crossing cylindrical lenses configured to increase uniformity of the light intensity distribution along a major axis of a cross-section of the light beam.