Diffractive Optical Elements

Reconfigurable Rainbow PIV for 3D Flow Measurement

We propose a reconfigurable rainbow PIV system that extends the volume size to a considerable range.

Rainbow Particle Imaging Velocimetry for Dense 3D Fluid Velocity Imaging

We demonstrate a 3D Particle Imaging Velocimetry method by employing a rainbow encoding and 3D optical flow decoding algorithm.

Beam shaping for multicolour light-emitting diodes with diffractive optical elements

We propose an improved particle swarm optimization method of ultra-thin diffractive optical elements design for multicolour beam shaping.

Encoded diffractive optics for full-spectrum computational imaging

We introduce numerically optimized encoded phase masks for focus and zoom through changes in the mechanical alignment.

The diffractive achromat: full spectrum computational imaging with diffractive optics

We introduce a diffractive achromat based on computational optimization and a corresponding algorithm for correction of residual aberrations.

Computational imaging using lightweight diffractive-refractive optics

We jointly design lightweight diffractive-refractive optics and post-processing algorithms to enable imaging under white light illumination.