Patent ID: 6813020
Filing Date: 2004-11-02
Classification: G01N

Abstract:
A device for determining values of at least one parameter of particles, said device comprising:a measuring element comprising a measuring region to accommodate said particles; illumination means for illuminating said measuring region; image acquisition means, comprising at least one camera, for acquiring at least one image of said measuring region illuminated by said illumination means; and processing means for determining the values of said parameter, from said image acquired by the camera, wherein said illumination means produce a point illumination source using a light beam having light rays focused onto an objective optic of the image acquisition means, said illumination means comprising at least one optical assembly including: a light source that generates the light beam; an optical fiber, connected at a first end to said light source, that transmits the light beam generated by said light source; and a field optic, fitted to a second end opposite said first end of said optical fiber, that focuses the light beam emerging from said optical fiber on the center of the objective optic of the acquisition means.