We report the design and development of an efficient speckle reduction device for projection imaging. The device is composed of a combination of a rod-shaped waveguide diffuser and a reflective pyramidal cavity. The simulation results reveal that the pyramidal cavity with waveguide diffuser is a highly efficient light guide comparable to the other conventional light guides. Further, the device was developed and tested experimentally on the basis of speckle contrast and image quality for both the microscopic and macroscopic objects. An acrylic rod-shaped waveguide diffuser was developed and mounted at the middle of a pyramidal shaped cavity which was fabricated using 3D printer. Four highly reflecting mirrors were installed to make the cavity reflective. The system is highly effective for the speckle suppression due to the coherence reduction via multiple scattering from the rod-shaped waveguide diffuser and multiple reflections from the pyramidal cavity. In the system, a combine...

中文翻译：

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利用波导扩散器和锥体腔进行投影成像的激光散斑减少装置的设计与开发

我们报告了用于投影成像的高效散斑减少装置的设计和开发。该设备由杆状波导漫射器和反射锥体构成。仿真结果表明，具有波导扩散器的锥体腔是一种高效的光导，可与其他常规光导相比。此外，该设备是根据斑点对比度和微观和宏观物体的图像质量进行实验开发和测试的。开发了丙烯酸棒状波导扩散器，并将其安装在使用3D打印机制作的金字塔形空腔的中间。安装了四个高反射镜以使腔反射。由于通过棒状波导漫射体的多次散射和锥体腔的多次反射而导致的相干性降低，因此该系统对于斑点抑制非常有效。在系统中，一个组合...