Wave-front reconstruction without twin-image blurring by two arbitrary step digital holograms.

We discuss a novel approach for numerical wave-front reconstruction which utilizes arbitrary phase step digital holography. Our experimental results demonstrate that only two digital holograms and a simple estimation procedure are required for twin-image suppression, and for numerical reconstruction. One advantage of this approach is its simplicity.

Numerical suppression of zero-order image in digital holography.

This work describes a novel approach that adopts numerical operation to suppress the zero-order images of reconstruction in digital holography. The entire process needs only one digital hologram and keeps under control the intensity ratio of the object wave to reference wave in recording procedure. Also the performance of numerical suppression is simple and effective by subtracting the numerical generated intensity of the object and reference waves from the digital hologram.