Method for simultaneous measurement of multiple aerosol particles based on optical tweezers

Optical tweezers have been widely used in the study of the physical and chemical properties of individual aerosol particles. However, the traditional method of using optical tweezers can only measure one particle at a time, which limits the efficiency and throughput of the measurement. Although the method of using a spatial light modulator (SLM) to simultaneously generate multiple optical traps has been developed, which adds significant complexity to the overall optical setup including the need for precise alignment of the SLM, integration with the trapping laser, and the implementation of algorithms to generate the desired multi-trap patterns. This research proposes a method for the simultaneous measurement of multiple aerosol particles based on optical tweezers. The method uses multiple combinations of polarization beam splitters and half-wave plates to generate multiple optical traps, which can capture and manipulate multiple aerosol particles simultaneously. The proposed method has the advantages of improved trapping efficiency, faster temporal control and reduced aberrations, which provides a new tool for the study of multiple aerosol particles properties and behavior.