利用连续波激光器和高速CCD，采用数字同轴全息系统，记录了乙醇喷雾粒子场全息图.对粒子场再现像进行聚焦像合成，自适应滤波、二值化、Roberts边缘提取，Hough变换和亚像素精度计算，得到粒子的直径和位置信息.利用两次曝光记录的两个序列全息图得到粒子位移，进而求得粒子的运动速度，给出了实验结果.研究结果表明，该实验系统可用于内燃机喷雾场测量，且具有光路系统简单、成本低等特点.

With CW (continuous wave) laser and a high-speed CCD,hologram of alcohol spray is recorded based on digital in-line holography arrangement.The reconstruction images of a hologram of the particle field are handled the way that in-focus images of the particles in the volume are integrated into a plane and binarized and the edge of the particle images is extracted by Roberts,then Hough transform and sub-pixel precision computing completed,and the size and position of the particles are obtained.The displacement of the particle is extracted by two sequences of the hologram recorded by two exposures and the velocity of the particle is obtained,and the experimental results are given.The research results show that the proposed experimental system is applied to measuring internal combustion engine spray field,which is simple in optical structure and low in cost.