Image sensor designed for low light applications

3rd November 2017
Lanna Cooper

The KAE-04471 image sensor from ON Semiconductor provides imaging performance, both in low light applications and in direct sunlight. The new 4.4 Megapixel Interline Transfer EMCCD sensor features high dynamic range coupled with low image noise and is available at FRAMOS. Applications operating both in darkness and in variable light conditions mostly benefit the military and defence, ITS, surveillance, scientific and medical imaging sectors.

The square 4/3” sensor features both Interline Transfer and Electron Multiplying, that combine these two imaging techniques to enable low light applications that require sensitivity at fast frame rates. The KAE-04471 sensor achieves a range of 72dB and a low readout noise of under 10rms in normal mode.

A range of 92dB and a readout noise of under 1rms can be achieved using the Intra-Scene switchable gain feature. The improved pixel size of 7.4µm compared to the 5.5µm pixel size in the existing KAE-02150, results in a higher sensitivity and similar to daylight images produced in low light.

The afore mentioned features provide an outstanding image quality with image uniformity and MTF, with little image irregularity.

Depending on the intensity of the incident light, pixel readout is routed through either the regular CCD output, or the electron multiplier. This mode of selection enables both focused and high contrast imaging in a variety of light applications, like direct sunlight, or low light night scenes.

Sibel Yorulmaz-Cokugur from FRAMOS highlights the qualities of KAE-04471: “ON Semiconductor is the only sensor producer to offer Interline Transfer EMCCD technology and sensor sensitivity ranging from 0.002 lux in the sub-lux range to direct sunlight at 10,000 lux. With very good image quality, ON Semiconductors KAE-04471 provides an excellent low light performance where other sensors reach their limits. The sensor is specially designed for the use in varying light applications for surveillance in Military and Defense, Intelligent Traffic Systems, as well as in Scientific and Medical applications.”

Benefits for military and defence, traffic surveillance, medical imaging, and science
Its day and night capability makes the KAE-04471 from ON Semiconductor the best choice for 24/7 operations for outdoor surveillance, driver assistance systems, aviation, traffic and toll surveillance. The medical and scientific sectors also benefit from sharp images at low light levels.

High contrast and low readout noise are features that also benefit microscopy, fluoroscopy, ophthalmology, and dermatology. The KAE-04471 sensor is available in both monochrome and Bayer colour versions.

The industry and product experts at FRAMOS apply their profound knowledge of sensors and systems to support customers integrating new sensors into their applications and projects, together with additional services like development support, customisations, and logistics.

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