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本文叙述了网格高速摄影的成象特性,用二维脉冲序列函数进行了分析.把网格器件用于光学系统中,获得了图象点阵列照片.目标和阵列象是对应的.测量了底片上的图象点阵列的密度分布,指出了分辨率和网格节距的关系.网格高速摄影与普通高速摄影相比是降低了图象分辨率而提高了图象对比亮度.在光学系统中使用网格器件的作用是把一个具有连续轮廓的外界目标分割成网格点阵象,通过点阵象作相对移动,在同一张底片上就可以得到许多与目标相对应的图象,网格高速摄影就是利用这种点阵运动原理来实现的.
In this paper, the imaging characteristics of grid high-speed photography are described and analyzed by two-dimensional pulse sequence function. The grid device is used in the optical system to obtain the image of point array. The density distribution of the image dot array on the film shows the relationship between the resolution and the pitch of the grid.Compared with ordinary high-speed photography, the grid high-speed photography reduces the image resolution and improves the contrast ratio of the image.In the optical The role of the grid device in the system is to divide an external target with a continuous contour into lattice lattice images. By moving the lattice image relative to each other, many images corresponding to the target can be obtained on the same film. Grid high-speed photography is to use this lattice movement principle to achieve.