Abstract

Complexities of the underwater environment can seriously affect many underwater detection means, especially the influence of light scattering by water. To solve this problem, a three-dimensional (3D) morphology measurement method is proposed based on the photoacoustic effect. In this method, a measurement object is irradiated with pulsed laser light to produce ultrasonic waves via the photoacoustic effect. A probe collects the ultrasonic signal and subsequent data processing can yield complete object detection. This approach can make full use of the advantages of high precision and good directivity of laser ranging and completely avoid the influence on the laser of backscattering from water. The results yield a displacement measurement accuracy of less than 0.5 mm and an average error of 3D reconstruction of 0.21 mm, demonstrating great application potential.

© 2022 Optica Publishing Group

Three-dimensional dynamic measurement of irregular stringy objects via digital holography

Longchao Yao, Jun Chen, Paul E. Sojka, Xuecheng Wu, and Kefa Cen
Opt. Lett. 43(6) 1283-1286 (2018)

Photopolymer-based coaxial holographic lens for spectral confocal displacement and morphology measurement

Hongpeng Liu, Baohua Wang, Rui Wang, Mingchang Wang, Dan Yu, and Weibo Wang
Opt. Lett. 44(14) 3554-3557 (2019)

Underwater image restoration via Stokes decomposition

Xiaobo Li, Jianuo Xu, Liping Zhang, Haofeng Hu, and Shih-Chi Chen
Opt. Lett. 47(11) 2854-2857 (2022)

Spectral interference contrast based non-contact photoacoustic microscopy realized by SDOCT

Zhenhe Ma, Ning Ding, Zhen Li, Keliang Zhu, Ang Li, Zhanhong Lin, Yi Wang, Yuqian Zhao, Yao Yu, Jingmin Luan, Xin Zhu, and Jian Liu
Opt. Lett. 47(11) 2895-2898 (2022)

Local–flexible coupling optical-resolution photoacoustic microscopy with enhanced sensitivity

Dongfang Li, Chao Tao, Zizhong Hu, Zhengyu Zhang, and Xiaojun Liu
Opt. Lett. 47(14) 3515-3518 (2022)