Opto-Electronic Engineering, Volume. 51, Issue 3, 230287-1(2024)
Design of short-range LiDAR receiver based on MEMS mirror
To address the ineffective reception of larger scanning field echoes by the small photosensitive area of the indium gallium arsenide InGaAs detector in the 1550 nm wavelength band, a receiver device suitable for near-range wide field-of-view applications has been designed. The optical system at the receiving end utilizes an afocal telecentric structure as the receiving antenna, achieving a reception field-of-view of 36° at a photosensitive area of 1 mm. The relative illuminance exceeds 95%, demonstrating excellent light collection and transmission characteristics. Additionally, the receiver circuit adopts a T-network amplification structure combined with a moment identification circuit, utilizing the TDC7200 to achieve high-precision time measurements. The flight time measurement accuracy is less than 120 ps within a range of 200 ns, and the experimental results demonstrate ranging accuracy better than 2 ns within an 8 m distance, meeting the requirements for near-range detection.
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Suisui Wan, Yajun Pang, Ruixiang Xue, Zhenxu Bai. Design of short-range LiDAR receiver based on MEMS mirror[J]. Opto-Electronic Engineering, 2024, 51(3): 230287-1
Category: Article
Received: Nov. 22, 2023
Accepted: Feb. 22, 2024
Published Online: Jul. 8, 2024
The Author Email: Pang Yajun (庞亚军)