Post by Michael Atlan

What if you could see through fog in real time? Ultrafast Doppler holography does just that at Institut Langevin - Ondes et images ESPCI Paris - PSL. It enables imaging of objects through dynamic scattering media—like thick fog—which effectively becomes transparent. How does it work? By combining spatial holographic image rendering with temporal principal component analysis, we process gigabytes of optical data per second—live—just like for ophthalmology. Several key filters make this possible: - tunable Doppler frequency filtering via high-speed dynamic interferometry, - diffraction-selective filtering to cut through scattering, - polarization filtering to isolate light reflected by objects. Real-time imaging runs on holovibes, the advanced GPU-accelerated open-source software for digital hologram rendering (https://lnkd.in/e5cpEpQP), achieving 10 GB/s bitrate using AMETEK Phantom High-Speed Cameras - Vision Research and EURESYS Coaxlink QSFP+ frame grabbers. Designed for extreme digital optical devices, it delivers massive data stream processing with sub-millisecond latency. This system is now set for testing at ONERA - The French Aerospace Lab for military applications. As the fastest real-time laser radar (LiDAR) using a high bitrate streaming camera, it's ready for other demanding use cases—enabling reliable, high-throughput imaging in harsh environments. As always, it's built to scale, simple and robust, and we’re ready to help you make a complete device—fast. Let’s reconsider what’s visible—even in the fog.

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