Patent ID: 7843561

Claim:
An optical system for a flow cytometer with an interrogation zone, the system comprising: a first light source that creates a first beam of a first wavelength; a first collimating element that collimates the first beam; a second light source that creates a second beam of a second wavelength, which is different than the first wavelength; a second collimating element that collimates the second beam from the second light source; a beam combining element that combines the collimated beams of the first and second collimating elements to form a combined collimated beam that is multichromatic, a focusing element that focuses the combined collimated beam to a single point; and a bracket including an adjustable mount for at least one of the first and the second light sources that allows for alignment of the second light source relative to the first light source, wherein the adjustable mount is adjustable along two axes.