Scanner CCD

The CCD has a long development time, and the technology and manufacturing processes are quite mature. The image quality of the CCD scanner is quite outstanding, and it can meet almost all requirements. It mainly uses CCD's miniature semiconductor light sensor as the core of the scanner. The use of a CCD for scanning requires a sophisticated optical system, which complicates the structure of the scanner. Therefore, it is characterized by high scanning quality, wide scanning range (sweepable objects), long service life, and high resolution. The traditional CCD technology works much like a copying machine. It uses an external high-brightness light source to illuminate the original, and the reflected light of the original is reflected on the CCD element through a mirror, a projection mirror and a beam splitter. Since the lens imaging has a certain clear range, the original can have a certain depth of field, that is, it can scan an object having a three-dimensional surface. The depth of field of the CCD scanner can generally reach more than ten centimeters. This is what manufacturers often say about 3D scanning. Due to the complexity of the CCD's optics, it is difficult to reduce the size, so the CCD scanner is generally thicker. The CCD device is the same as the device used in the digital camera, and the manufacturing technology is very mature. The CCD device can achieve very high optical resolution and has reached 1200×2400 dpi or more.