Optimized Iterative Algorithm to Generate Computer-Generated Holograms Based on the Intermediate Angular-Spectrum Method

The intermediate angular-spectrum method is an efficient way to calculate computer-generated holograms without zero-padding and cropping operation. In this paper, we present an optimized iteration algorithm to improve the reconstruction quality in the intermediate angular-spectrum method. The quadratic phase is multiplied with the target image as the initial complex amplitude distribution to suppresses the speckle noise and the freedom domain is introduced in the image plane to improve the reconstruction quality. Numerical simulations and optical experiments are performed to demonstrate that proposed method is an effective method for high-quality reconstruction. It is expected that proposed method could be widely applied in the holographic field in the future.

Automated summary

The intermediate angular-spectrum method is an efficient way to calculate computer-generated holograms without zero-padding and cropping operation. In this paper, an optimized iteration algorithm is proposed to improve the reconstruction quality. The method suppresses speckle noise by multiplying the quadratic phase with the target image, and improves the reconstruction quality by introducing the freedom domain. Numerical simulations and optical experiments demonstrate the effectiveness of the proposed method for high-quality reconstruction.