We report a compact, low cost, multi-color diode laser based illumination system for display and laser-projectors. An innovative speckle reduction system based on spatially structured and temporally varying beams was designed and developed. Three primary color lasers were efficiently combined and then made incident onto electromechanically controlled diffractive optical elements. This system splits a single laser beam to multiple moving beams, thus realizing the spatial, angular and temporal diversity simultaneously. Multiple moving beams are made incident onto a large diameter plano-convex lens. Thus, collecting most of the scattered light and focused on the input of the multimode fiber bundle (MMFB). A compact electrical vibrator was developed to vibrate MMFB. The entire system was realized for speckle reduction significantly with the combined effect of spatial, temporal, angular and wavelength diversity. Experimental results of speckle reduction and speckle free imaging are p...

中文翻译：

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使用双衍射光学元件使用空间结构化和随时间变化的光束减少激光散斑

我们报告了一种用于显示器和激光投影仪的紧凑，低成本，多色二极管激光照明系统。设计并开发了一种基于空间结构和随时间变化的光束的创新型去斑系统。三个原色激光器被有效地组合，然后入射到机电控制的衍射光学元件上。该系统将单个激光束分裂为多个移动光束，从而同时实现空间，角度和时间分集。使多个移动光束入射到大直径平凸透镜上。因此，收集大部分散射光并聚焦在多模光纤束（MMFB）的输入上。开发了一种紧凑的电动振动器来振动MMFB。通过空间，时间，角度和波长分集的综合作用，实现了整个系统的斑点减少效果。减少斑点和无斑点成像的实验结果是...