数字微镜用于菲涅耳衍射全息显示的理论研究

Theory Research on Fresnel Diffraction Hologram Display with DMD

导出人眼感觉的菲涅耳衍射全息的数字微镜重建场强度表达式.基于数字微镜每显示周期8幅二值图形成灰度图的机制,比较了每周期8幅及256幅二值图方案时菲涅耳衍射全息的显示质量.结果表明,数字微镜显示图像的质量低于数字全息波面重建质量.存在优化控制数字微镜提高显示图像质量的可能性.

The intensity expression of DMD reconstruction field from Fresnel diffraction holography was educed. Based on the principle of forming gray image by 8 sub-images in a display period, simulation example and digital holography reconstruction image were compared. The comparison result indicates that the quality of DMD reconstruction image is lower than the quality of digital holography reconstruction image. Two decomposing methods,which are 8 sub images and 256 sub-images, were compared in theory. The quality of DMD reconstruction image with 256 sub-images is better. But the feasibility of improving display images exists through optimizing DMD controlling method.