Abstract

Jianshe MaPing SuFeipeng XiaZhenbo RenTong LiuTsinghua UniversityGraduate School at ShenzhenShenzhen, Guangdong 518055, ChinaE-mail: su.ping@mail.sz.tsinghua.edu.cnAbstract. A digital micro-mirror device (DMD) acting as a real-time holo-gram is an emerging technology in dynamic holographic projection. Thispaper presents a lensless image magnification method in DMD hologra-phy by using a Fresnel hologram. By analyzing the diffraction order dis-tribution in the image plane of a hologram produced by DMD, we find thefactors that limit the size of the magnified image. We perform a lenslessmagnification experiment that shows good magnified images in accor-dance with the numerical results. Finally, we discuss methods to eliminatelongitudinal error and chromatic aberration in three-dimensional (3-D) andcolor projection, respectively, and present a 3-D image reconstructionresult that shows lensless magnification of a 3-D image without distortion.Itisbelievedthatthistechniquecanbeusedinfuturereal-timeholographicprojection based on digital light processing technology.

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