Seeing the Unseen: Revolutionizing Long-Range Drone Detection with the Photon Force PF32

The rapid proliferation of Unmanned Aerial Systems (UAS) has transformed industries ranging from logistics to filmmaking. But as low-altitude airspace becomes increasingly crowded, the need for robust, long-range drone detection has never been more critical. Detecting drones remotely is notoriously challenging due to their small scattering cross-sections, weak light signals, and overwhelming background noise.

Enter the Photon Force PF32—a state-of-the-art Time-Correlated Single-Photon Counting (TCSPC) camera that is rewriting the rules of remote sensing and optical defense.

The Challenge of Passive Drone Detection

Traditional radar and imaging systems often struggle with non-cooperative drones at high standoff distances. Because drones appear as mere “point objects” from afar, relying on contour detection or standard spatial imaging often results in false negatives, especially in high-noise environments. Furthermore, active systems (like LiDAR) require powerful illumination, which isn’t always viable for covert or passive monitoring.

To solve this, the defense and security sectors are turning toward Single-Photon Avalanche Diode (SPAD) technology to capture high-frequency dynamic characteristics—like the blindingly fast rotation of a drone’s rotor blades—even from miles away.

Why the Photon Force PF32 is a Game-Changer

We showcase the PF32 for drone detection at SPIE Defense & Security 2026 – the Photon Force PF32 isn’t your average camera; it is a highly advanced time-tagging SPAD array designed to quite literally capture light as it travels.

  • Unmatched Timing Resolution: With an in-pixel timing accuracy of 55 picoseconds (ps), it easily captures nanosecond-level events.

  • Massive Throughput: The 32×32 TCSPC pixel array can process up to 500 million photon timestamps per second.

  • Zero Analogue Noise: Fully digital photon counting and time stamping eliminate analogue readout noise, delivering an incredibly pure data stream.

  • Optimized Interface: Recent updates include a dedicated GUI specifically engineered to aid in long-range tracking and target identification.

Achieving Long Range

The true power of the PF32 in counter-UAS applications was recently demonstrated in groundbreaking research utilizing Fast Fourier Transforms (FFTs) of Photon Counting data.

The Mechanics of Drone Detection with the PF32

Instead of trying to capture a standard high-resolution image of a tiny dot in the sky, the FFT method uses the inherent high frame rate of the PF32 to look for high frequency components within the data – the flicker of its rotors cutting through the air.

  • Unrivaled Noise Resistance: By extracting the dynamic frequency of the rotor rather than relying on spatial resolution, the system successfully filters out heavy background clutter.

The Future of Optical Security

The integration of ultra-fast SPAD sensors like the PF32 into passive drone detection systems represents a massive leap forward for airspace management and critical infrastructure protection. By shifting the focus from what the object looks like to how the object’s light behaves over fractions of a nanosecond, security professionals can detect threats further, faster, and more reliably than ever before.

Optimize your optical detection stack today. Whether you require the ultrafast readout of the PF32-Ultra or the accessible, high-performance TCSPC of the new PF32-Lite, upgrading to single-photon sensitivity is the definitive way to future-proof your remote sensing applications.