Long Exposure Short Pulse Synchronous Phase Lock Method for Capturing High Dynamic Surface Shape

Sensors

卷:20

Xiaodong Gao¹  Weiqiang Han¹  Le Bai¹  Zhenjie Fan¹  Bo Liu¹ 

[1] Institute of Optics and Electronics of Chinese Academy of Sciences, Chengdu 610209, China;

关键词: vibrating mirrors;    pulsed laser;    laser repeat frequency;    synchronous phase lock;    short pulse;    interference pattern;   

DOI  :  10.3390/s20092550

来源: DOAJ

【 摘 要 】

In infrared weak target detection systems, high-frequency vibrating mirrors (VMs) are a core component. The dynamic surface shape of the VM has a direct impact on imaging quality and the optical modulation effect, so its measurement is necessary but also very difficult. Measurement of the dynamic surface shape of VMs requires a transiently acquired image series, but traditional methods cannot perform this task, as, when the VM is vibrating at a frequency of 3033 Hz, using high-speed cameras to acquire the images would result in frame rates exceeding 1.34 MFPS, which is currently technically impossible. In this paper, we propose the long exposure short pulse synchronous phase lock (LSPL) method, which can capture the dynamic surface shape using a camera working at 10 FPS. In addition, our proposed approach uses a single laser pulse and can achieve the dynamic surface shape measurement on a single frame image.

【 授权许可】

Unknown