Binary modulation screen design method for generating adjustable X-ray super-Rayleigh speckle field

The invention discloses a binary modulation screen design method for generating an adjustable X-ray super-Rayleigh speckle field. The method comprises the following steps: setting the target contrastratio of the speckle field; setting cell states of the modulation screen: a porous state and a non-porous state, setting an initial modulation screen and an initial speckle field, and enabling an optimization parameter to be equal to an initial parameter; dividing the optimized modulation screen into a plurality of areas containing a plurality of cells; randomly selecting an area overturning cell;judging whether an overturning condition is met or not, and if so, enabling the optimization parameter to be equal to the overturned parameter; randomly selecting one area from the remaining areas, repeating the above steps, and after all the cells are turned over, obtaining a final optimized modulation screen and a speckle field; judging whether a threshold condition is met or not, and if yes, outputting the modulation s