Figure 11.

Diagram of a CCD detector for EM. The incident electrons are converted to photons by the scintillator. Fiber optics transmit the image to the CCD (charge coupled device) sensor where the photons generate electrical charge (CCD electrons). The charge is accumulated in parallel registers. During readout, this charge is shifted line by line to the serial register from where it is transferred pixel by pixel to the output analog-to-digital converter. Image reproduced with permission from H. Tietz.