Method for optimizing holographic display and device therefor

A holographic display comprising:

• a back-propagation unit configured to back-propagate target field data comprising a plurality of planes in a depth direction to a complex plane of a space light modulator (SLM) to generate a predicted hologram;
• a binarization unit configured to convert the predicted hologram into a binary hologram;
• a forward-propagation unit configured to generate predicted field data by forward-propagating the binary hologram to a reproduction plane through an optical system simulation model;
• and
• an error identification unit configured to calculate a loss function between the predicted field data and the target field data,
• wherein the back-propagation unit is further configured to generate a new predicted hologram for the predicted field data by using a stochastic gradient descent (SGD) method to reduce a value of the loss function, and
• the error identification unit repeats the generation of the new predicted hologram until the value of the loss function is less than a predefined threshold.