Related Experiment Video
Updated: Jul 23, 2026
14:03
Using an Automated 3D-tracking System to Record Individual and Shoals of Adult Zebrafish
Published on: December 5, 2013
11.4K
3D tracking of plankton with single-camera stereoscopy.
J Moscatelli1, X Benoît Gonin1, F Elias1
1PMMH, CNRS, ESPCI Paris, Université PSL, Sorbonne Université, Université Paris Cité, F-75005 Paris, France.
The Review of Scientific Instruments
|December 5, 2025
Summary
We developed a 3D tracking device for micro-objects in flow. This system precisely tracks micro-algae (Chlamydomonas reinhardtii) to study confinement effects on motility and interactions with boundaries.
Area of Science:
- Microfluidics
- Biophysics
- Optical Engineering
Background:
- Studying micro-organism behavior in confined environments is essential.
- Understanding micro-object dynamics under flow requires precise 3D tracking.
Purpose of the Study:
- To introduce a novel device for 3D tracking of micro-objects in narrow channels.
- To investigate the influence of flow, gravity, and confinement on micro-algae motility.
Main Methods:
- A single camera captures reflections of micro-objects in a capillary using angled mirrors.
- 3D trajectories are reconstructed with micrometer precision.
- Chlamydomonas reinhardtii motility was analyzed under Poiseuille flow using fluorescence and bright-field imaging.
Main Results:
- The device achieves micrometer-scale precision for 3D trajectory reconstruction.
- The study analyzed the interactions between shear flow, gravity, and micro-algae.
- The 3D tracking setup successfully described micro-algae interactions with solid boundaries.
Conclusions:
- The developed 3D tracking device offers high precision for micro-object analysis in confined flows.
- This technology enables detailed investigation of micro-organism motility and boundary interactions.
- The findings are crucial for understanding micro-swimmer behavior in microfluidic systems.
