![]() The resulting current generated at the exit anode is proportional in amplitude to the incident light intensity. In a photomultiplier tube (PMT), when an incident photon hits the entrance photocathode, a primary electron is produced, ejected, and further collected and amplified by a series of dynodes. the size and density of pixels determines the resolution and field of view in the image plane,.each well has finite storage capacity (hence pixel saturation),.the photon-to-charge conversion efficiency depends on the wavelength,.each pixel stores charges in proportion to the number of photons absorbed,.the imager is essentially an array of photodiodes,.The sequence of voltages is in turn sampled, digitized, and stored in memory by the CCD camera.įrame transfer methods allow exposure and readout in parallel. a charge-to-voltage converter: the last capacitor in the array dumps its charge into an amplifier that converts the charge into a voltage.a transmission region where charge-coupled devices per se move electric charges laterally along shift registers by transferring them sequentially between capacitive bins gate voltages dictate the travel of charge packets. ![]()
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