Patent ID: 7821641

Claim:
A three-dimensional flow cell for aligning non-isometric particles in a liquid sample in two axes, comprising: a feed zone (Z 1 ) for the sample containing non-isometric particles to be aligned, an expansion zone (Z 2 ), in which each volume element of the liquid sample is expanded in two axes, in contact with the feed zone (Z 1 ), a measurement zone (Z 3 ), in which a reflectance measurement of the liquid sample aligned in two axes is carried out, in contact with the expansion zone (Z 2 ), and an outlet zone (Z 4 ), from which the liquid sample exits, in contact with the measurement zone (Z 3 ), wherein a fluid element of the sample with the dimensions a, b, c is transformed in the expansion zone (Z 2 ) into a fluid element with the dimensions a×n, b/(n×m), c×m, a being the width, b the height and c the length of the fluid element and n and m being constants which depend on the geometry of the flow cell and wherein n is 1.5 to 7.