Patent ID: 8804120

Claim:
A fine particle analyzing apparatus, comprising: a light irradiation unit configured to irradiate a fine particle that flows in a flow path with a laser beam; and a detection unit configured to detect light emitted from the fine particle that is irradiated with the laser beam; wherein the light irradiation unit includes at least a light source that is composed of a semiconductor laser, an optical fiber that converts a beam pattern of the laser beam generated from the light source into a top-hat type beam pattern, and a light source driving control unit configured to supply driving current, the driving current being obtained by superimposing high-frequency current on direct current, to the light source; wherein the light source driving control unit includes at least a high-frequency oscillator, a broadband amplifier, and a current switching circuit, and the high-frequency oscillator, the broadband amplifier, and the current switching circuit are coupled in a direct current way.