RESEARCH OF PARTICLE STREAK VELOCIMETRY BASED ON LIGHT FIELD ZEMAX SIMULATION

Light field imaging technology can capture the light intensity and particle propagation direction within a single exposure, thereby achieving three-dimensional imaging while simplifying experimental complexity. Compared to conventional methods such as particle image velocimetry and particle tracking velocimetry, particle streak velocimetry (PSV) extends the upper limit of measurable velocity, operates effectively under lower light intensities, and offers pronounced advantages in high-speed flow field analysis. The integration of light field imaging and PSV measurement techniques combine the strengths of both methods, making this approach particularly promising for three-dimensional flow field investigations. Despite its potential, this area remains underexplored. Previously, the author has developed a three-dimensional flow field experimental measurement system based on light field PSV. In this article, the author employs Zemax software to construct a Galileo-type simulated light field imaging system in non-sequential mode. The imaging characteristics of this system were analyzed, yielding a depth calibration curve for the simulated virtual light field imaging system and a synthetic three-dimensional trajectory map. The algorithm reconstructed the threedimensional trajectory by integrating the depth calibration curve with a light field PSV-based threedimensional flow field measurement and processing algorithm. This study establishes a Zemax simulation framework for light field PSV, offering critical simulation data to advance research in three-dimensional flow field measurement utilizing light field PSV.