Improving computer generated holograms with an efficiently optimized quadratic phase
It is common practice in computer generated holography to use random phase distributions as initial solutions for iterative algorithms such as the as the Gerchberg-Saxton algorithm. Unfortunately, such practice results to noisy holograms with many phase discontinuities. Phase discontinuities degrade the reconstructed image and make them less robust to experiments. To minimize phase discontinuities while adding little complexity to existing algorithms, this work presents a fast method for calculating an optimal initial quadratic phase is used to initialize hologram calculations.