| 摘要 |
An apparatus comprises an optical background component configured to direct optical radiation in an adjustable manner to suspension from an opposite direction with respect to optical radiation from a main optical radiation source illuminating the suspension, and an image processer being configured to receive images of dyed particles of the suspension having color variation caused by micro-compression from a camera placeable on an opposite side with respect to the optical background component and form a micro-compression index of the dyed particles on the basis of the color variation of the dyed particles. |
