The galvanometer scanner is also called a laser scanner, and its design idea follows the design method of the ammeter. The principle is to input a position signal, and the galvanometer will swing a certain angle according to the conversion ratio of a certain voltage and an angle. In the galvanometer scanning system, the waveform of the optical scanning is a vector scanning, and the scanning speed of the system determines the stability of the laser pattern. The main advantages of galvo scanner is high speed and high precision, which are widely used in laser marking, life science, digital imaging (medical imaging and microscopy, optical coherence tomography).