Opto-Electronics


Active pixel CMOS flat panel array

30 April 2008 Opto-Electronics

Hamamatsu recently introduced a large area flat panel CMOS sensor for X-ray imaging applications. The C9728DK is a new active pixel CMOS image sensor in which each separate megapixel in 1056x1056 image format has an individual amplifier, providing extremely low noise readout, with the noise being at least six times lower than existing conventional passive type CMOS flat panel sensors.

Utilising a correlated double sampling (CDS) circuit and a direct deposition (DD) columnar structure CsI scintillator, the C9728DK creates high quality true 14-bit digital video signals. The specific DD CsI scintillator construction eliminates focusing lenses and tapered fibre-optics associated with the use of CCD sensors, which can cause image distortion and peeling problems in the field.

The new sensor is also suitable for X-ray diffraction pattern imaging and other scientific X-ray imaging requiring very low noise with realtime image quality. The unit comes with USB2.0 interface for ease of operation and demonstration software with code and library for USB2.0 is supplied with the sensor.



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