This paper reports an electromagnetic oscillation flexible printed circuit board (FPCB) micromirror based scanning triangulation laser rangefinder (LRF). The FPCB micromirror has a large aperture (8 mm × 5.5 mm) and high flatness (radius of curvature, ∼ 15 m), that overcomes conventional MEMS micromirrors’ limitation of a small aperture size (less than 5 mm). Subsequently high power lasers with large beam sizes and good collimation can be used in micromirror based scanning LRF for better performance. As a result, the LRF in this paper achieved a larger scanning angle and longer detecting distance than those in literature. Both modelling and prototyping are presented. Three lasers (Laser 1: 2 mW; Laser 2: 20 mW; and Laser 3: 100 mW) are used to characterise the LRF. Eye-safety calculation is presented for the three lasers. Achieved performance (measurement distance and field of view (FOV)) is: with Laser 1, distance of 15–70 cm and FOV of −15° to 10°, error ≤ 4%; with Laser 2, di...

中文翻译：

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基于振荡FPCB微镜的三角测量激光测距仪

本文报道了一种基于电磁振荡柔性印刷电路板（FPCB）微镜的扫描三角测量激光测距仪（LRF）。FPCB微镜具有大孔径（8 mm×5.5 mm）和高平坦度（曲率半径，约15 m），克服了传统MEMS微镜对小孔径（小于5 mm）的限制。随后，可以在基于微镜的扫描LRF中使用具有大光束尺寸和良好准直度的高功率激光器，以获得更好的性能。结果，与文献相比，本文的LRF实现了更大的扫描角度和更长的检测距离。同时介绍了建模和原型制作。三个激光（激光1：2 mW；激光2：20 mW；激光3：100 mW）用于表征LRF。给出了三种激光器的人眼安全性计算。达到的性能（测量距离和视场（FOV））为：对于激光1，距离为15–70 cm，FOV为-15°至10°，误差≤4％；使用Laser 2，di ...