An illumination method based on fiber array
Citation
马亚运 (MA Yayun), 韩绍坤 (HAN Shaokun), 翟宇 (ZHAI Yu), & 黄富明 (HUANG Fuming). (2018). 一种基于光纤阵列的激光照明方法 (An illumination method based on fiber array). 光 学 技 术 (OPTICAL TECHNIQUE), 44(2), 201-205. doi: 10.13741/j.cnki.11-1879/o4.2018.02.013
Keywords
- 光纤阵列 / Fiber Array
- 激光照明 / Laser Illumination
- 均匀照明 / Uniform Illumination
- 激光三维成像 / Laser 3D Imaging
- 光纤激光器 / Fiber Laser Device
- 光纤分路器 / Fiber Splitter
- 点阵照明 / Dot-Array Lighting
- APD 面阵探测器 / APD Planar-Array Detector
- 能量利用率 / Energy Utilization Efficiency
- 高斯光束 / Gaussian Beam
- 光束整形 / Beam Shaping
- Dammann 光栅 / Dammann Grating
Brief
This article proposes a uniform laser illumination system for 3D imaging using a fiber array that outputs multiple laser beams from a single pulsed laser source via a fiber splitter, achieving more even light distribution and better energy utilization compared to traditional methods.
Summary
This article introduces a novel laser illumination system for laser 3D imaging that uses a fiber array to generate a dot-array light source, formed by splitting a single pulsed infrared laser beam into 64 equal energy beams via a fiber splitter. This approach aims to achieve more uniform light distribution and higher laser energy utilization compared to traditional flood illumination methods that rely on shaping Gaussian beams with lenses or Dammann gratings. The reflected laser light from a target is then captured by an APD planar-array detector, where each pixel corresponds to a point light source. Simulation experiments validated the effectiveness of this fiber array-based illumination system in providing more stable transmission and detection, especially when dealing with non-planar target surfaces and system noise.
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