Diffractive optical elements

Comparative performance analysis of multi-level diffractive lens and lens fabricated by grayscale lithography and soft-imprinting

We propose a comparative analysis of DOEs fabricated by multi-level photolithography and grayscale lithography.

Learned B-spline parametrization of lattice focal coding for monocular RGBD imaging

We employ B-spline parameterization for the DOE surface geometry representation for RGBD imaging.

CAL2: project update of the NRC Canada facility-class focal plane wavefront sensor for the Gemini Planet Imager 2 upgrade

The CAL2 project is being built for the GPI calibration system.

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.