Difference between CCD barcode scanner and Laser Scanner

I. CCD scanners use the principle of photoelectrical coupling (CCD) to imaging bar code printed patterns and then decode them. Its advantages are: No rotating shaft, motor, long service life; low price. When selecting a CCD scanner, two parameters are most important: 1. scene Depth: Because CCD imaging is similar to a camera, if you want to increase the depth of field, you need to increase the lens accordingly, so that the size of CCD is too large and inconvenient to operate. Good CCD should be read without sticking to the bar code, and the volume is moderate, the operation is comfortable. 2. Resolution: to increase the resolution of CCD, the unit element of the photosensitive element at the imaging site must be added. Low-cost CCD is generally 5 pixels (pixel). It is sufficient to read commercial codes such as EAN and UPC, which is difficult for other code systems. The mid-range CCD is usually 1024pixel, and some even reach 2048pixe1, which can distinguish the Code with the smallest unit element of 1mm.
2. Laser hand-held scanner is a single-line scanner that uses laser diodes as light sources. It mainly has two types: Mirror conversion and trembling. The mirror type uses a high-speed motor to drive a mirror group rotation, so that the diode emits a single point laser into the first line. The production cost of the trembling mirror is lower than that of the mirror, but the laser gun of this principle is not easy to increase the scanning speed, generally 33 times/Second, the maximum can reach 100 times/second, the Representative brands are symbol and PSC. When selecting a laser scanner, commercial enterprises must pay attention to scanning speed and resolution. depth of field is not a key factor. The resolution is greatly reduced when the depth of field is increased. An excellent handheld laser scanner should have a high scanning speed and a high resolution within a fixed depth of field.

Simply put, the scanning depth of field is different from the scanning speed and resolution, and the laser gun is better than CCD.