King Abdullah University of Science and Technology

Xiong Dun

Wolfgang Heidrich

Ramzi Idoughi

Sigurdur Tryggvi Thoroddsen

Andres A Aguirre-Pablo

Jinhui Xiong

Abdulrahman B Aljedaani

Erqiang Li

Congli Wang

Qiang Fu

Imaging of complex, non-stationary three dimensional (3D) flow velocities is achieved by encoding depth into color. A flow volumeis illuminated with a continuumof light planeswhereby each depth corresponds to a respective light planehaving a specific wavelength of light. A diffractive componentin the cameraoptics, which records the trajectories of illuminated particleswithin the flow volume, ensures that all light planesare in focus simultaneously. The setup permits a user to track 3D trajectories of particleswithin the flow volumeby 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.

Rainbow particle imaging velocimetry for dense 3D fluid velocity imaging

A wavefront sensor includes a mask and a sensor utilized to capture a diffraction pattern generated by light incident to the mask. A reference image is captured in response to a plane wavefront incident on the mask, and another measurement image is captured in response to a distorted wavefront incident on the mask. The distorted wavefront is reconstructed based on differences between the reference image and the measurement image.

Wavefront sensor and method of reconstructing distorted wavefronts

Growing community of inventors

Thuwal, Saudi Arabia

Xiong Dun