Plankton Imaging Experiment Study Based on Two-way Illumination Field

It is of great scientific and economic significance to observe the marine plankton in situ. In this paper, based on the technology that the incident light can be reflected by a microprism array and return in parallel direction, the existence of incident and reflected light generate a two-way illumination light field. This structure makes it possible that the observation of transparent and non-transparent targets get in sync. Experiments results prove that the method is effective and the technology is expected to be used in underwater observation system.