The difference between laser and ccd barcode scanner
The working principle of the laser scanning gun is to create a laser source point by the internal laser device, hit a reflective sheet with a mechanical structure device, and then rely on the vibration motor to swing the laser point into a laser line to shine on the barcode, and then pass AD Decoded into a digital signal. The CCD scanning module generally uses LED light-emitting diode light sources, relying on the CCD photosensitive element, and then through photoelectric signal conversion.
Most laser bar code scanning guns rely on dispensing to fix the machine to create a mechanical device, so it is often easy to be damaged when swinging, and the pendulum is falling off, so we can often see that the light source scanned by some laser guns becomes a point after falling. , Causing quite high rework. The CCD scanning gun has no mechanical structure in the middle, so the drop resistance is unmatched by the laser, so the stability is better. The CCD barcode scanning gun has a significantly lower repair rate than the laser scanning module.
From the physical principles of Laser and CCD, laser refers to light with strong energy and good parallelism of stimulated radiation, and now most red light is emitted by LEDs. CCD is not the kind of infrared light we say. Physical definition Infrared rays are electromagnetic waves that are radiated spontaneously by objects with temperature and are not visible.
Erbium infrared includes with a wavelength greater than CCD, while laser refers to light of a certain wavelength. They are not necessarily related and do not belong to the same field. Laser is the radiation generated by the amplification of stimulated emitted light. Infrared light is a part of the spectrum with a smaller frequency and a larger wavelength that cannot be observed by the naked eye. The wavelength ranges from 0.76 to 400 microns. From their wavelength and energy, CCD is determined by strong light. Light penetration and anti-interference are worse than laser, so outdoor laser is better than CCD under strong light.