Lecture 15: Cameras & Lenses (11)

Just curious, what's usually the material of the sensor? Any mechanism of the reason that it can store the "light"?


I think the part that converts light into currents is the photodiode in the CMOS sensor. Photodiodes can be manufactured from a variety of materials including Silicon, Germanium, and Indium Gallium Arsenide. Each material uses different properties for cost benefits, increased sensitivity, wavelength range, low noise levels, or even response speed. From a very basic physics perspective, I think we just need to find a good material that can turn photon energy into electric energy. I found this video to be helpful in providing more backgrounds information on image sensors:https://www.youtube.com/watch?v=Csiv7-7ps40

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