CCD is the abbreviation of Charge Coupled Device, which can convert light into charge, store and transfer the charge, and take out the stored charge to change the voltage, so it is an ideal camera element. The CCD camera made of it has the characteristics of small volume, light weight, no influence of magnetic field, anti-vibration and impact, so it is widely used.

The working principle of CCD is that the light reflected by the photographed object propagates to the lens and is focused on the CCD chip through the lens. CCD accumulates corresponding charges according to the intensity of light, and generates electrical signals representing pictures after periodic discharge. After filtering and amplification, the standard composite video signal is output through the output end of the camera. This standard video signal is the same as the video output of home video recorder, VCD player and home video camera, so it can also be recorded or connected to TV to watch.

Extended data

CCD cameras are divided into:

(1) The image pixel is about 250,000 pixels, the color resolution is about 330 lines, and the black-and-white resolution is about 400 lines.

(2) The image pixels are between 250,000 and 380,000, the color resolution is 420 lines, and the black and white resolution is below 500 lines.

(3) The image is more than 380,000 points, the color resolution is more than or equal to 480 lines, the black-and-white resolution is more than 600 lines.

Baidu encyclopedia: CCD camera