Flow cytometer
AssigneeSysmex Corporation
InventorsMasatsugu Ozasa, Tatsuya Kosako
Life of this patent
Estimating the term…
Abstract
A flow cytometer includes a flow cell for flowing a sample liquid in a flowing direction, to form a sample flow the sample liquid containing particles to be analyzed, a laser diode radiating a laser beam having an elliptic cross section, a beam collimating section for collimating the laser beam radiated from the laser diode, a beam spot forming section for focusing the collimated beam at the sample flow in the flow cell to form a beam spot, and a light receiving section for receiving light generated from the particles at the beam spot to detect optical information of the particles, wherein the laser diode is arranged such that a minor diameter of the elliptic section of the laser beam is parallel to the sample flow.
Claims17
A flow cytometer, comprising:
- a flow cell for flowing, therein, a sample liquid in a flowing direction to form a sample flow, the sample liquid containing particles to be analyzed;
- a laser diode radiating a laser beam having an elliptic cross section;
- a beam collimating section for collimating the laser beam radiated from the laser diode;
- a beam diffusing section for diffusing the collimated beam in a direction perpendicular to the flowing direction;
- a beam spot forming section for focusing the diffused beam at the sample flow in the flow cell to form a beam spot, the beam spot being an ellipse having a minor diameter in the flowing direction and a major diameter perpendicular to the flowing direction;
- and
- a light receiving section for receiving light generated from the particles at the beam spot to detect optical information of the particles,
- wherein the laser diode is arranged such that a minor diameter of the elliptic cross section of the laser beam is parallel to the flowing direction.
A flow cytometer, comprising:
- a light source for emitting a collimated light beam;
- a photoelectric detector;
- a flow cell for flowing, therein, a sample liquid in a flowing direction to form a sample flow, the sample liquid containing particles to be analyzed;
- a cylindrical lens system including a first cylindrical lens and a second cylindrical lens, the first cylindrical lens converging the collimated light beam in a direction perpendicular to the flowing direction and the second cylindrical lens diffusing the converged light beam in the direction perpendicular to the flowing direction;
- a first condenser lens for converging the diffused light beam at the sample flow in the flow cell to form a beam spot, the beam spot being an ellipse having a minor diameter in the flowing direction and a major diameter perpendicular to the flowing direction;
- a second condenser lens for converging light generated from the particles to the photoelectric detector;
- and
- a beam stopper, arranged between the flow cell and the second condenser lens, for shielding a direct beam passing through the flow cell.
Dependencies are inferred from the claim text.