Calibration method of light field Micro-PIV system

The invention discloses a calibration method of a light field Micro-PIV system, which comprises the following steps of: preparing a concentrated calibration sample and a dilute calibration sample withtracer particles inside; calibrating the distance between a microlens array and a microscope barrel by using the concentrated calibration sample combined with a sharpness algorithm; calibrating the distance between a sensor surface and the microlens array by using the dilute calibration sample combined with an image similarity algorithm. According to the calibration method of the light field Micro-PIV system, a laser and fluorescent polystyrene microspheres are used for calibration instead of parallel white light sources, errors caused by different incident light wavelengths can be eliminated, and the calibration precision is high. 本发明公开了种光场Micro-PIV系统的标定方法，包括如下步骤：制备内部具有示踪粒子的浓、稀标定样品；利用浓标定样品结合清晰度算法标定微透镜阵列和显微镜筒镜的距离；利用稀标定样品结合图像相似度算法标定传感器面和微透镜阵列的距离。本发明利用激光器和荧光聚苯乙烯微球代替平行白光源进行标定，可消除因入射光波长不同而带来的误差，标定精度高。