An approach for sensing underwater particles using digital holographic imaging

Chao Liu; Xiaoping Wang; Yingtian Hu; Ming Tang; Zheng Shi

doi:10.1117/12.2505602

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12 December 2018 An approach for sensing underwater particles using digital holographic imaging

Chao Liu; Xiaoping Wang; Yingtian Hu; Ming Tang; Zheng Shi

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Proceedings Volume 10850, Ocean Optics and Information Technology; 108500S (2018) https://doi.org/10.1117/12.2505602
Event: International Symposium on Optoelectronic Technology and Application 2018, 2018, Beijing, China

Abstract

The purpose of this paper is to use digital holographic imaging to capture the hologram of the underwater particles. Digital holography includes two steps: wavefront recording and wavefront reconstruction. In the experiments of the underwater particles, some technique issues, such as the principle of digital holography, zero-order item suppressing and reconstruction algorithm are discussed. The complex amplitude of the underwater particles is reconstructed using numerical methods based on the Kirchhoff-Fresnel integral formula. In this case, it enables reconstruction of the object wavefield in a plane at a distance d from hologram. This novel method for imaging the underwater particles using digital holography is an extremely valuable technique for the study of underwater particles fields as it has many advantages such as large depth of field, no focusing, high resolution and has the ability to record the wavefront information of all particles in the entire volume. Finally, this paper demonstrates it is possible for digital holographic imaging setup with less complexity to image underwater particles according to our laboratory results.

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Chao Liu, Xiaoping Wang, Yingtian Hu, Ming Tang, and Zheng Shi "An approach for sensing underwater particles using digital holographic imaging", Proc. SPIE 10850, Ocean Optics and Information Technology, 108500S (12 December 2018); https://doi.org/10.1117/12.2505602