What is ccd?

CCD refers to charge coupled devices. In CCD, the input signal is electromagnetic radiation and the output signal is charge packets, and the number of charge packets corresponds to the intensity of electromagnetic radiation. The dynamic range of the input signal is basically infinite: the brightness can range from zero (which means there are no photons at all) to the intensity generated by the brightest object in the universe. But the dynamic range of the output signal is limited.

Generation of CCD:

CCD was invented by W.S. Boyle and G.E. Smith of Bell Laboratories. Because it has the functions of photoelectric conversion, information storage, time delay and sequential transmission of electrical signals, it has developed rapidly in terms of high integration and low power consumption. CCD is an indispensable key device for image acquisition and digital processing, which is widely used in science, education, medicine, commerce, industry, military and consumer fields. CCD system mainly includes optical system (microlens), CCD and image processing module, and some also include color filter.