Image-Distortion Correction Algorithm for Computer-Generated Holographic Display

Current computer generated holography (CGH) display often suffers from an inevitable problem that the quality of the reconstructed images is often declined by distortions. Improving reconstruction quality by optimizing optical elements used in CGH display is costly and time-consuming. In this work, a numerical correction method of image distortion for CGH display is proposed. CGHs of designed testing charts are employed for pre-calibration. A camera-based wavefront acquisition system is employed for sensing the distorted reconstruction wavefront. An automatic pre-calibration algorithm is developed to reduce the distortion. Root mean square error of the reconstructed images after calibration could be dramatically reduced by the proposed algorithm.