Flash frequency laser speckle three-dimensional target obtaining system and method

The invention relates to a flash frequency laser speckle three-dimensional target obtaining system and a flash frequency laser speckle three-dimensional target obtaining method. The system comprises a synchronous control unit, a speckle generating unit, an image collecting unit and an image processing unit, wherein the speckle generating unit comprises a pulse light source and a diffraction element, and is used for generating random distribution speckle patterns and projecting the patterns onto an object to be measured, the synchronous control unit controls the speckle generating unit and the image collecting unit to synchronously work, and the image collecting unit transmits collected image data to the image processing unit. The invention provides the flash frequency laser speckle three-dimensional target obtaining system and the flash frequency laser speckle three-dimensional target obtaining method, which have the advantages that environment light components with relative constant collecting information can be eliminated, so the signal noise ratio of signals is improved.