This boosted the camera's performance in natural light conditions, in contrast to previous metasurface cameras that required the pure laser light of a laboratory or other ideal conditions to produce high-quality images,' said Felix Heide, the study's senior author and an assistant professor of computer science at Princeton. 'A key innovation in the camera's creation was the integrated design of the optical surface and the signal processing algorithms that produce the image. Further, the image quality surpasses anything other previous ultracompact cameras have been able to achieve. Machine learning-based algorithms turn the light information from each post into an actual image. Per Princeton, 'Varying the design of each post is necessary to correctly shape the entire optical wavefront.' Each post features unique geometry and functions like an optical antenna. Each post is roughly the size of the human immunodeficiency virus (HIV). The camera relies upon a technology called a metasurface, which includes 1.6 million cylindrical posts. The new system, neural nano-optics (right), produces sharper, full-color images. Previous micro-sized cameras (left) captured images with low detail, false color and distortion. In this work, we close this performance gap by introducing a neural nano-optics imager,' Although metasurface optics offer a path to such ultra-small imagers, existing methods have achieved image quality far worse than bulky refractive alternatives, fundamentally limited by aberrations at large apertures and low f-numbers. Specifically, the research paper detailing the technology says 'Nano-optic imagers that modulate light at sub-wavelength scales could enable new applications in diverse domains ranging from robotics to medicine. This new sensor technology combines meta surface optics and machine learning models to reconstruct images via the nano-optic imager. Researchers from Princeton University and the University of Washington have developed a high-resolution color camera roughly the size of a coarse grain of salt.

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