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相关概念视频

Light Acquisition02:16

Light Acquisition

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In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
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相关实验视频

Updated: Jul 25, 2025

Multimodal Volumetric Retinal Imaging by Oblique Scanning Laser Ophthalmoscopy oSLO and Optical Coherence Tomography OCT
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Multimodal Volumetric Retinal Imaging by Oblique Scanning Laser Ophthalmoscopy oSLO and Optical Coherence Tomography OCT

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基于无人驾驶飞行器的光学摄像头通信系统使用光扩散纤维和滚动百叶窗图像传感器.

Yun-Han Chang, Shang-Yen Tsai, Chi-Wai Chow

    Optics express
    |June 29, 2023
    PubMed
    概括

    在无人驾驶飞行器 (UAV) 上的一种新型光扩散纤维创建了一个宽视野 (FOV) 光学摄像头通信 (OCC) 系统. 该系统实现3.6kbit/s的数据速率,克服了无人机辅助光无线通信 (OWC) 的挑战.

    科学领域:

    • 光学无线通信的无线通信
    • 空中机器人机器人 机器人机器人
    • 信号处理 信号处理

    背景情况:

    • 无人驾驶飞行器 (UAV) 辅助的光学无线通信 (OWC) 系统需要广泛的视野 (FOV) 和接收器 (Rx) 倾斜角度支持.
    • 现有的系统面临着FOV和适应UAV移动的局限性.

    研究的目的:

    • 为大型FOV光学摄像头通信 (OCC) 系统开发和演示配备光扩散纤维的无人机.
    • 为了提高数据传输能力和解码在无人机辅助的OWC.

    主要方法:

    • 使用可曲,轻量级的光扩散纤维作为无人机的延长光源.
    • 实现了一个滚动快门机制,配有补充金属氧化物半导体 (CMOS) 图像传感器,用于像素行对像素行信号提取.
    • 采用长短期记忆神经网络 (LSTM-NN) 来改善薄光扩散纤维信号的滚动百叶窗解码.

    主要成果:

    • 扩散光的纤维有效地充当了扩散光的纤维.
    • 全方位的光学天线
    • 提供广泛的FOVs.
    • 实现了3.6kbit/s的数据速率.
    • 达到了前向错误纠正比特错误率 (FEC BER前) 的3.8 × 10-3的门.

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    结论:

    • 拟议的光扩散纤维无人机系统为大型FOV OWC提供了可行的解决方案.
    • 在这种情况下,滚动百叶窗和LSTM-NN的组合显著增强了数据传输.
    • 这项技术有望为强大而高容量的空中光通信提供希望.