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Article | REF: R6733 V1

Ultra High Speed Digital Imaging

Authors: Pierre SLANGEN, Nicolas LONG, Pascal PICART

Publication date: June 10, 2016 | Lire en français

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    3. Photosensitive electronic sensors

    An electrical charge is created at a pixel (pixel is the contraction of picture element) in proportion to the level of light incident at that site. The complexity of high-speed image sensors lies in the way pixels are combined to achieve optimum spatial and temporal resolution of the final matrix.

    3.1 Photoelectric effect

    The simplest photosensitive electronic sensor is a light-sensitive gate, called a "semiconductor junction" (silicon, germanium), electrically polarized (MOS capacitance, Metal Oxyde Semiconductor) so that it can retain the electron-hole pair obtained by the photoelectric effect when illuminated by a light source emitting in the spectral absorption band of its substrate. The photoelectric effect is obtained when the energy of the incident photon,...

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