Abstract: A device is disclosed for determining characteristic parameters of the dimensions of nanoparticles in suspension in a liquid. The device emits an incident light beam that is linearly polarized along a polarization axis; a detecting unit comprising a measurement arm that is rotatable with respect to an axis of rotation, the detecting unit comprising first and second detection channels that are separated by a polarization-splitting element arranged in the measurement arm; a fixed sample holder receives a container of cylindrical symmetry of the sample, an axis of symmetry of the container being coincident with the axis of rotation of the measurement arm; and a control unit. The polarization-splitting element of the measurement arm is configured to simultaneously send, over each of the first and second detection channels, respectively, a first and second polarized component of the beam scattered by the sample.

Abstract: According to one aspect, the subject of the present description is a device (100) for determining characteristic parameters of the dimensions of nanoparticles in suspension in a liquid. The device (100) comprises light-emitting means (101) configured to emit an incident light beam (Bi) that is linearly polarized along a polarization axis (P1); a detecting unit (102) comprising a measurement arm (120) that is rotatable with respect to an axis of rotation (?), said detecting unit comprising first and second detection channels (151, 161) that are separated by a polarization-splitting element (125) arranged in said measurement arm; a fixed sample holder (103), configured to receive a container (10) of cylindrical symmetry of said sample, an axis of symmetry of the container being coincident with the axis of rotation of the measurement arm; and a control unit (104).

Abstract: A device for characterizing particles dispersed in a liquid medium includes a fibered light emission source, a fibered optical detector, and a measurement probe intended to be hermetically submerged in the liquid medium. The measurement probe includes: a confinement tube intended to pass through at least one wall of the probe in a sealed manner and suitable for receiving a sample of the liquid medium, as well as an optical measurement head including a focusing optics for the focusing of an illumination light beam in the confinement tube and a collection optics for the collection toward the optical detector of a beam of light backscattered by the dispersed particles. The characterization device also includes a processing unit suitable for the characterization of the particles based on the backscattered-light beam.

Abstract: The present invention is a device for measuring the intensity of the light scattered by a thin film of a colloidal medium, comprising a monochromatic light source, a convergent optical system focusing the source onto the thin film to be analyzed comprising a dioptric element with one of the faces thereof constituting a first wall defining the thin film, at least one photosensitive detector producing a signal representing light scattered or backscattered by the thin film and means for processing the signal. A second wall of the device has a plane surface at the end of a rod.