Optical particle analysis

摘要

A system and method for determining particle size, shape, and/or quantity. The particle can alter the polarization state of two oppositely-polarized light beams, thus allowing the light beams to interfere with each other. An interference pattern from interference of the two light beams can be captured by a CCD. The interference pattern can be analyzed to determine size, shape, and/or quantity.

主权项

1. A particle analysis system comprising:
a. an unpolarized light source directed towards a charge couple device camera (CCD); b. a fluid-flow region disposed between the light source and the CCD; c. a light-blocking screen disposed between the light source and the fluid-flow region; and d. two polarization devices, oppositely-polarized with respect to each other, disposed in the screen, and capable of allowing light from the light source to pass through the polarization devices, through the fluid-flow region, and onto the CCD.