🔬 The Sony sensor inside your phone takes photos of your dog. This one will never photograph anything you can see. It captures X-rays — 26,100 frames every second, precisely enough to measure the energy of a single photon. And the design didn't come from a camera division. It came from a physics lab.
On June 9, Sony Semiconductor Solutions announced it has commercialized the IMX711, a direct-conversion X-ray CMOS image sensor co-developed with RIKEN, Japan's flagship national research institute. Mass production shipments begin in the first quarter of fiscal 2026, which is to say right about now. Sony bills it as the industry's fastest sensor of its kind.
What is this sensor actually for?
The IMX711 isn't headed for hospital radiology rooms. It's headed for factories and research labs.
Sony's target is the inspection and measurement equipment market: X-ray machines that look for defects inside lithium-ion batteries and semiconductor packages without destroying them, and the scientific instruments used in materials and life-science research. Batteries are the clearest driver — an internal defect can mean a fire, so there's strong demand to inspect cells at production-line speed. Semiconductors follow the same logic: as chips get stacked into denser packages, flaws invisible from the outside matter more.
Sony also points to uses built on the sensor's ability to tell photon energies apart: element mapping, which color-codes what elements an object is made of, and combined measurements that capture crystal structure and elemental composition at once instead of in separate runs.
A champion defending its turf, or a challenger's opening move?
The answer is the latter. Sony has reigned for years in smartphone camera sensors, but in sensors that detect X-rays directly, it is close to a newcomer. This field belongs to specialists. In photon-counting detectors for science, Switzerland's DECTRIS has been widely adopted by the world's leading synchrotron facilities and instrument makers since the mid-2000s. In industrial X-ray inspection, companies like Japan's Hamamatsu Photonics support non-destructive testing in automotive, electronics and other industries with deep lineups of flat-panel and line-scan detectors.
So the IMX711 isn't a move to protect existing share — Sony has no established position here to protect. It's an entry weapon. And the pitch isn't "X percent faster than before." It goes after a structural problem the whole field has lived with: a trade-off baked into the measurement methods themselves.
One caveat belongs up front. The "industry's fastest" label has boundaries — among integration-type X-ray CMOS sensors, by Sony's own survey — and the photon-counting camp isn't standing still: DECTRIS's newest detector reaches 120,000 frames per second with pixel binning. The IMX711's real differentiation isn't raw speed but, as we're about to see, bundling the strengths of both methods into one chip.
The dilemma: count photons, or add them up
X-ray sensors have traditionally come in two flavors, and each one fails where the other shines.
Photon-counting sensors treat each X-ray photon as a yes-or-no event: anything above a threshold counts as one hit, anything below is discarded as noise. That makes them superb in dim conditions. But flood them with a bright X-ray beam and photons start arriving faster than the sensor can count — hits get missed, and the data goes wrong exactly when there's the most of it.
Integration-type sensors take the opposite approach. Instead of counting, they accumulate the total energy hitting each pixel, like a bucket collecting rain. Bright beams are no problem. The weakness is at the dim end: faint signals drown in the sensor's own electronic noise.
For instrument makers, this has meant choosing a sensor for the bright scenario or the dim one (or buying both). A battery inspection line where thick metal casings sit next to thin electrode films spans both extremes in a single image.
What one chip now does
The IMX711 is an integration-type sensor that behaves, at the dim end, almost like a photon counter. Two numbers explain how.
The first is 26,100 frames per second, roughly a thousand times the frame rate of a cinema film. By reading out the sensor this fast, each frame accumulates only a tiny amount of charge, so even an intense X-ray beam never saturates the pixels. The bucket empties before it can overflow.
The second is 34 e-rms. That's the sensor's random noise, measured in electrons: each pixel's readout wobbles by only about 34 electrons' worth of charge (this is Sony's evaluation figure; the guaranteed spec is 60 e-rms). A single X-ray photon generates far more charge than that, so individual photons stand out clearly above the noise floor. The sensor doesn't just detect that a photon arrived — it measures how much energy it carried.
That last part matters more than it might sound. A photon's energy is a chemical fingerprint: iron, nickel, copper and gold each emit X-rays at characteristic energies. A sensor that resolves those energies, pixel by pixel, can tell you not just the shape of an object but what elements it's made of — in one exposure, with no threshold settings decided in advance.
Source: Sony Semiconductor Solutions
Physically, the chip looks nothing like a camera sensor. It's a 3.73-type device measuring 27.88mm by 52.85mm (a diagonal of 59.8mm), but it holds only about 280,000 effective pixels. Each pixel is a 72.6-micrometer square, tens of times wider than the pixels in a smartphone camera, sitting on silicon 650 micrometers thick. X-rays are penetrating and scarce compared with visible light; catching them takes big, deep pixels, not many small ones.
From a synchrotron lab to a product catalog
The pixel structure at the heart of the IMX711 was invented by Dr. Takaki Hatsui of RIKEN. His team developed it into CITIUS, a high-speed X-ray detector for synchrotron radiation facilities, and demonstrated it in experiments at SPring-8, the giant ring-shaped X-ray facility in western Japan. The lineage is hard to miss: the IMX711 shares CITIUS's 72.6-micrometer pixels, 650-micrometer silicon and 17,400fps continuous mode, and Sony's own demo image for the new sensor spells out the word "CITIUS" in letters made of titanium, iron, nickel, copper and gold — each metal identified purely by its photon energy.
Source: Sony Semiconductor Solutions / RIKEN
What Sony brought to the partnership was everything needed to turn a scientific instrument into a manufacturable product: circuit design that pushed the frame rate to 26,100fps, hardening against X-ray irradiation damage and high voltages, and the manufacturing and packaging technology for mass production. It's a clean division of labor: a national lab invents the physics, a commercial sensor giant industrializes it.
Japan's edge, hidden inside invisible machines
Sony's image sensor business is usually discussed in terms of smartphone cameras and its share battles there. But scientific and industrial sensing is a field where deep semiconductor process expertise, precision packaging and long-term research partnerships compound over decades.
The machines this sensor will live inside — battery inspectors, chip-fab tools, beamline detectors — are invisible to consumers. But the next time a battery doesn't catch fire or a chip doesn't fail, there's a small chance a RIKEN physicist's pixel design, mass-produced by Sony, was somewhere in the supply chain doing its job.
Does your country have a national lab whose inventions end up in commercial products like this? We'd love to hear what the research-to-industry pipeline looks like where you live.
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