title: Image quality improvement of polygon computer generated holography.
abstract: Quality of holographic reconstruction image is seriously affected by undesirable messy fringes in polygon-based computer generated holography. Here, several methods have been proposed to improve the image quality, including a modified encoding method based on spatial-domain Fraunhofer diffraction and a specific LED light source. Fast Fourier transform is applied to the basic element of polygon and fringe-invisible reconstruction is achieved after introducing initial random phase. Furthermore, we find that the image with satisfactory fidelity and sharp edge can be reconstructed by either a LED with moderate coherence level or a modulator with small pixel pitch. Satisfactory image quality without obvious speckle noise is observed under the illumination of bandpass-filter-aided LED. The experimental results are consistent well with the correlation analysis on the acceptable viewing angle and the coherence length of the light source.
authors.forename: Xiao-Ning
authors.initials: XN
authors.lastname: Pang
authors.forename: Ding-Chen
authors.initials: DC
authors.lastname: Chen
authors.forename: Yi-Cong
authors.initials: YC
authors.lastname: Ding
authors.forename: Yi-Gui
authors.initials: YG
authors.lastname: Chen
authors.forename: Shao-Ji
authors.initials: SJ
authors.lastname: Jiang
authors.forename: Jian-Wen
authors.initials: JW
authors.lastname: Dong