What is a linear CCD digital camera? Advantages and disadvantages of linear CCD digital camera

According to the classification of image reading methods, CCD can be divided into linear CCD and area CCD. Linear CCD image reading adopts one-dimensional mode, so it is called linear.

The biggest feature of linear CCD digital camera is its high resolution, and the maximum number of pixels that can be photographed is as high as 65.438+0.3 billion. The CCD chip used is long and narrow, that is, the photosensitive tiny units are evenly arranged in a row, instead of being evenly arranged in several columns to form a rectangular plane like an area CCD. When a digital camera equipped with a linear CCD works, it "shoots" the scene line by line in the process of CCD moving (scanning), that is, it captures a large image area by scanning the CCD on the image plane. Unfortunately, although the resolution of digital camera using linear CCD chip is extremely high, due to the scanning process, the exposure mode is similar to that of platform scanner. The higher the resolution, the longer the exposure time is required, which makes it impossible for such digital cameras to shoot moving scenes, let alone flash photography. For example, shooting with artificial light can only be done without strongpoint. However, it has a simple structure and can produce very high-definition images, and the quality of the images taken is better than that of the area CCD digital camera.

Obviously, the area CCD digital camera should be used for shooting, and the scanning linear CCD digital camera can only be used for still life shooting.