White light reconstruction of image plane digital holograms

Abstract

A real-time system is developed that employs a CCD sensor for recording and a reflective high-resolution liquid crystal display for reconstructing of image plane digital holograms. Two types of light sources, namely, the coherent (laser) and white light (LED) are used for optical reconstructions of static and dynamic object wave fronts. As expected, white light reconstructions exhibit improved properties compared to the corresponding monochrome reconstructions. However, these improvements become substantial in cases in which digital holograms are preprocessed by applying the common algebraic operations such as subtraction.

Linearity and Optimum-Sampling in Photon-Counting Digital Holographic Microscopy

“…The standard numerical procedure for reconstructing image plane DHs can be described briefly as: (i) the recorded DH is Fourier transformed yielding for linear recordings three separated terms (zeroth, plus first, and minus first orders) in the frequency plane, (ii) one diffraction term (for example, plus first) is isolated, (iii) the resulting image with the isolated part is inverse Fourier transformed, and (iv) the obtained image is multiplied by its complex conjugate. Alternatively, the same procedure can be performed by optical means using a high-resolution liquid crystal display [33].…”