Differences between flying laser marking machine and other laser marking equipment:
The flying laser marking machine has powerful text and graphic processing capabilities, and can automatically generate batch numbers and serial numbers. In addition, the intelligent control interface of the flying laser marking machine can flexibly connect various automatic devices and sensors, and the software functions can flexibly adapt to special situations. Dynamic marking is more flexible, that is, there is no workspace, and unlimited 360 degree marking can be performed on the product surface. Of course, the flying laser marking machine can also be installed on the assembly line and rotated with the roller to mark the product.
Compared with other laser marking machines, the main difference between the flying laser marking machine and other laser marking equipment in product structure lies in the difference between the laser head unit, galvanometer and control software. In short, the laser should be more efficient, the control software should be more perfect, and the galvanometer speed should be faster. Therefore, the flying laser marking equipment should be more advanced than the fixed laser equipment. Sign up. With the development of science and technology, the flying laser marking machine has attracted countless attention due to its excellent marking effect and excellent quality, and its market acceptance is also strong, so it has gradually reached a certain market share.
The flying laser marking machine greatly improves the production efficiency in the marking process, and also effectively improves the production efficiency. It has the following advantages:
1. Features that cannot be removed and have unique visual and tactile effects;
2. It has strong anti-counterfeiting and anti smuggling performance;
3. Meet the requirements of labels and tags, production line manufacturing, automated manufacturing and non-traditional interface materials.
Q-switched lasers can produce high intensity lasers with short pulses. For high pulse energy, the active medium must be able to store enough energy, which requires longer peak duration, higher laser ion density and lower amplification power; If the gain power is too high, the spontaneous emission limits the energy accumulation, and the initial loss must be high to avoid premature ignition of the laser. Gas, semiconductor and dye lasers with a lifetime greater than one order of magnitude (in nanoseconds) are not suitable for Q-switching.
Semiconductor laser is the most common and technically important type of Q-switched laser, but fiber laser can also use Q-switched and increase the average power through fiber amplifier, while the cavity length of chip laser is very long. Shorter and narrower pulse width.
Active and passive Q switching
An active Q-switched laser uses a modulator to actively modulate the intracavity loss. For example, when an acousto-optic modulator is inserted into a resonator, when RF power is applied, part of the beam will refract and pass through the resonator. If a large amount of energy is accumulated in the laser medium, the RF current will be suddenly beveled Generates and emits laser pulses.
Passive Q-switched lasers use saturable absorbers to adjust intracavity losses. In the saturable absorber, the light with low intensity is absorbed and the light with high intensity is transmitted, so the loss can be passively modulated by the light intensity in the cavity.
The saturable absorber used in the Q switch is usually a crystal or glass doped with transition metal ions. For example, Cr4+: YAG crystals are commonly used for 1.064 µ m Nd: YAG lasers (including chip lasers), while V3+: YAG crystals are suitable for 1.3 µ m wavelength lasers. The modulation depth depends on the doping concentration and crystal length, and the saturation energy can be controlled by the mode field of the absorber. Saturated absorption ions can also be added to the fibers.