Foveal scanning based on an optical-phase array

We utilize the space-variant structure of the human fovea as a basis for a novel, to the best of our knowledge, foveal approach based on optical-phases array (OPA). This approach can be used to solve issues in 3D imaging and achieve a large field of view and high resolution with real-time application. A foveal scanning model based on the OPA is established. Simulations and experiments are performed to verify the models and illustrate the advantages of foveal scanning compared with traditional raster scanning. Simulations agree well with the theory, and the foveal approach has higher efficiency than traditional raster scanning. These results can serve as a reference for developing biomimetic sensors that mimic the human eye. (C) 2020 Optical Society of America