Selective dual laser metal 3D printer large size

The laser printer is composed of laser, acousto-optic modulator, high-frequency drive, scanner, synchronizer, optical deflector, etc. Its function is to modulate the binary dot matrix information sent by the interface circuit on the laser beam, and then scan it on the photoreceptor. The photosensitive body and the photographic mechanism constitute an electronic photographic transfer system, which transfers the image of pictures and texts on the photosensitive drum to the printing paper. The principle is the same as that of the copier. Laser printer is a non impact output device that combines laser scanning technology with electronic imaging technology.

The laser beam emitted by the laser is injected into the acousto-optic deflection modulator through the reflector. At the same time, the binary image text dot matrix information sent by the computer is sent to the font generator from the interface to form the binary pulse information of the desired font. The signal generated by the synchronizer controls 9 high-frequency oscillators, and then is added to the acousto-optic modulator through the frequency synthesizer and power amplifier to modulate the laser beam emitted by the reflector. The modulated light beam is shot into the multi-faceted rotating mirror, and then focused by the wide-angle focusing mirror and shot onto the surface of the photoconductive drum (selenium drum), so that the angular velocity scanning becomes the linear velocity scanning, and the whole scanning process is completed.