Galvanometers are used across a broad spectrum of industries including transportation, biotechnology, entertainment, medical diagnostics and therapeutics, and defense (see figure 1). They are used to collect images in confocal microscopy, DNA biochip imaging, and lidar applications. They can produce images by scanning information onto film or plastics. Galvanometers are the main force behind many laser-based material handling applications such as ablation, cutting, drilling, marking and welding.
Figure 1. Galvo scanners can mark images marked on fabric, wood, metal, and plastic
Introduction
To select the appropriate galvanometer system, start by listing the basic parameters, which are derived from your specific application. These parameters, which include optical wavelength, field size, working distance, focused spot diameter, accuracy, process time, and lifetime, will help guide you to some basic choices for an optical design and the appropriate galvanometer. The goal is to select a galvanometer that provides the appropriate platform to handle the mirror size, speed, accuracy, and scanning lifetime requirements for your application.
A laser scanning galvanometer consists of a limited-rotation torque motor with a sensitive position detector and a mirror attached to one end (see figure 2). The limits of rotation are typically bounded by about 20° mechanical (±40° optical). The rotor may be supported by flexures or ball bearings. The hallmark of a good galvanometer is its ability to produce a high-bandwidth response to a given command signal, while maintaining accuracy and repeatability over a wide range of operating conditions.
Figure 2. The drawing motor has a 30 mm scanning mirror
Mirror and Galvo Choices
Mirror size and shape is based on the diameter of the beam to be reflected, the incident angle, and also the neededscan angle. Scanning a 10-mm beam requires a 10-mm clear aperture at all scan angles. Trimming extraneous material from the mirror to cut back inertia results in the typical elliptical or polygon-shaped galvo mirror.
Sino-Galvo Tech. was founded in 2001, and our galvanometer scanners already have got CE, ROHS, FCC and REACH certifications, quality control in accordance with ISO9001 quality system standard, and we exported our products to many countries and regions.We also provide complete marking system including fiber laser marking machine, CO2 laser marking machine, production date batch number serial number laser marking machine and other laser equipment.
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