Patent ID: 8670120

Claim:
A device for analyzing a polyphase mixture ( 2 ) via a light beam ( 3 ) backscattered by said mixture, comprising: a cell ( 1 ) having a capacity component of vertical extent, capable of containing the polyphase mixture, means ( 4 ) for emitting a light beam ( 5 ) in a direction of the cell, so that the light beam extends in a vertical plane (PV) covering at least a height (hc) of the cell containing the polyphase mixture ( 2 ), means ( 6 ) for receiving at least a part of the light beam ( 3 ) backscattered by said polyphase mixture, covering a backscattered light beam ( 3 ) height extending over the height (hc) of the cell containing the polyphase mixture ( 2 ), characterized in that the device further comprises: optical conjugation means ( 17 ) arranged between the cell ( 1 ) and the means ( 6 ) for receiving at least a part of the light beam ( 3 ) backscattered by the polyphase mixture ( 2 ), said receiver means ( 6 ) comprising a matrix sensor ( 20 ) provided with a plurality of pixels, forming a surface for receiving said at least part of the backscattered light beam, extending along a vertical direction and a horizontal direction, means ( 7 ) for analyzing said at least part of the light beam ( 3 ) backscattered by the polyphase mixture ( 2 ) and received by the matrix sensor ( 20 ) via the optical conjugation means ( 17 ), the light beam ( 5 ) emitted in the direction of the cell having, at an interface ( 9 ) between an inner surface ( 10 ) of a wall ( 18 ) of the cell ( 1 ) and the polyphase mixture ( 2 ), a vertical line shape ( 16 ) whose width is less, than a free transport path ( 1 *) of the polyphase mixture ( 2 ).