Looking near and far without a lens: Radial masks give thin cameras a large depth of field
From Osaka University 27/10/23 To take an image that is completely in focus, one of the most familiar parts of a camera – the lens – isn’t necessary anymore. Instead, a thin mask over the image sensor can do the job. But the kind of mask you use makes a huge difference to how sharp […]
New detector unlocks large-scale optical neural networks: Faster and energy-efficient
From Optica 25/08/23 Faster, energy-efficient diffractive ONN could be used for image and video processing For the first time, researchers have used a surface normal nonlinear photodetector (SNPD) to improve the speed and energy efficiency of a diffractive optical neural network (ONN). The new device lays the groundwork for large-scale ONNs, which can perform high-speed […]