Amplitude-modulated continuous-wave laser scanner employing adaptive gain control for avoidance of receiver saturation

Chao Zhang; Sifan Liu; Zheyuan Zhang; Fulin Xiang; Neisei Hayashi; Lei Jin; Sze Yun Set; Shinji Yamashita

doi:10.1117/12.2543884

2 March 2020 Amplitude-modulated continuous-wave laser scanner employing adaptive gain control for avoidance of receiver saturation

Chao Zhang, Sifan Liu, Zheyuan Zhang, Fulin Xiang, Neisei Hayashi, Lei Jin, Sze Yun Set, Shinji Yamashita

Author Affiliations +

Proceedings Volume 11287, Photonic Instrumentation Engineering VII; 1128708 (2020) https://doi.org/10.1117/12.2543884
Event: SPIE OPTO, 2020, San Francisco, California, United States

Abstract

With the rise of Industry 4.0, smart factory is fast becoming a key concept in infrastructure. To realize the autonomous production system, it is necessary to ensure the parts are properly manufactured. 3D scanners are expected to play a vital role in quality assessment in smart factories. Especially, amplitude-modulated continuous-wave laser scanners benefit from high accuracy and high sensitivity which are suitable for industrial inspection. However, due to the limited dynamic range of receiver electronics, such laser scanners fail to obtain the data points in 3D measurement of highly reflective objects. This impairment deteriorates the performance of conversion of 3D point clouds to solid data for shape inspection, 3D modeling, reverse engineering etc. We coped with receiver saturation by adopting a high-speed polarizationindependent variable optical attenuator in our laser scanner. With such a lase scanner, we have succeeded in prevention of data loss due to receiver saturation.

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Citation Download Citation

Chao Zhang, Sifan Liu, Zheyuan Zhang, Fulin Xiang, Neisei Hayashi, Lei Jin, Sze Yun Set, and Shinji Yamashita "Amplitude-modulated continuous-wave laser scanner employing adaptive gain control for avoidance of receiver saturation", Proc. SPIE 11287, Photonic Instrumentation Engineering VII, 1128708 (2 March 2020); https://doi.org/10.1117/12.2543884

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