Rainbow particle imaging velocimetry for dense 3D fluid velocity imaging
US10782311B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 2017 |
| Grant date | Sep 22, 2020 |
| Priority date | — |
| Expiry date | Jul 26, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T11/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Imaging of complex, non-stationary three dimensional (3D) flow velocities is achieved by encoding depth into color. A flow volume 22 is illuminated with a continuum 40 of light planes 42 whereby each depth corresponds to a respective light plane 14 having a specific wavelength of light. A diffractive component 46 in the camera 24 optics, which records the trajectories of illuminated particles 20 within the flow volume 22, ensures that all light planes 42 are in focus simultaneously. The setup permits a user to track 3D trajectories of particles 20 within the flow volume 22 by combining two dimensional (2D) spatial and one dimensional (1D) color information. For reconstruction, an image formation model for recovering stationary 3D particle positions is provided. 3D velocity estimation is achieved with a variant of a 3D optical flow approach that accounts for both physical constraints as well as the color (rainbow) image formation model.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.