Patent ID: 8241571
Filing Date: 2012-08-14
Classification: G01N

Abstract:
1. A particle analyzing apparatus comprising: a capillary tube having a first end portion, a second opposite end portion, and a predetermined internal cross-sectional area, said first end portion being adapted to be suspended for immersion into a sample fluid containing particles to be analyzed; one or more holders for holding one or more sample fluids, said one or more holders being movable relative to the first end portion of the capillary tube; a source of light; an optical system configured to receive and focus the light from said source to form and direct a substantially rectangular beam through the capillary tube to define an analyzing region in the capillary tube, the analyzing region being defined by an internal wall of the capillary tube and a thickness of the substantially rectangular beam; a pump connected to the second end portion of the capillary tube, said pump being adapted to draw a volume of a sample fluid through the first end portion into the capillary tube and passing through said analyzing region; at least one first detector for detecting fluorescent light emitted by particles excited by said beam in said analyzing region.