We demonstrate a very simple experimental setup that allows our students to study and fully characterize an industrial cmosimage Sensor. In 2014, 95% of produced cameras are cmosimagesensors (Complementary Metal Ox...
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ISBN:
(纸本)9781510600287
We demonstrate a very simple experimental setup that allows our students to study and fully characterize an industrial cmosimage Sensor. In 2014, 95% of produced cameras are cmosimagesensors (Complementary Metal Oxyd Semiconductor) and only 5% are still ccdsensors (Charge-Coupled Device). The main difference between cmos and ccd is that each cmos sensor pixel has its own readout circuit (voltage-photoelectron conversion and amplification) directly adjacent to the photosensitive area. cmosimagesensors are not only cheaper, because simpler to manufacture, they have a lower power consumption than ccdsensors. They also allow image processing at the pixel level (zones of interest (ROI), Binning, filtering, etc ...). However, compare to ccd sensor, cmossensors often demonstrate a lower dynamic, a larger read-out noise and a larger non uniformity of the spatial response. In overall, it is very important to understand every characteristic of an image sensor and be able to measure it in a simple way. Our system consist in a small integrating sphere illuminated by a white LED, a standard calibrated photodiode (or a light power meter) and a small monochromator (or several colored LED). Control of the camera parameters, image acquisition and data processing are achieved with a single Matlab homemade software.
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