How to choose laser marking airport mirror? what should I be aware of

The field lens is one of the important accessories of the laser marking machine. Its function is to focus the light emitted by the galvanometer on a plane. The field lens is also called a lens or a focusing environment. The specifications of the field lens determine the marking range of the product.

The field lens is generally assembled by the laser marking machine manufacturer in the marking machine, and rarely needs to be purchased separately. Of course, there are also some laser marking machine assembly enthusiasts If you want to buy accessories and assemble one for your own marking, on how to choose the field mirror, the following editor will briefly introduce several aspects.

The wavelength of the laser must be matched with its own equipment. If you really don’t know the wavelength of your laser marking machine, you can refer to the following: Non-metallic materials The equipment is generally μm, that is, the field lens of CO2; and the equipment of semiconductor materials, that is, the equipment of key metal materials, the light wavelength is 1064nm; and the laser engraving machine, the green laser equipment, the field lens is 532nm light wavelength of.

About the swath. Many customers want to buy a large-format field lens, because they consider that their products will be very large this time, and they also think that their products may be higher next time, and they may need a higher width. Good long-term equity, so buy a large format. However, the larger the width of the field lens, the larger the lens focal length and the working distance of the matched field lens. The longer the focal length of the lens, the larger the light spot of the laser focusing point will be. All the same lasers are spread over the total area of u200bu200bthe larger light spot, and the specific energy must be reduced, which will cause the laser marking depth to be very shallow. The attenuation coefficient of the kinetic energy of the laser in the air is very strong. The larger the focal length of the field lens, the greater the kinetic energy loss of the laser, and the thicker and lighter the wire frame will be. Therefore, the width of the field lens must be selected appropriately, and there is no need to blindly follow the trend.

Lens focal length. Under the standard of the same width, due to the different design schemes and production capacity of various field lens manufacturers, field lenses with the same width will occur, and the focal lengths of the lenses will be different. In the case of the same width, the less the focal length of the lens, the better. However, due to the processing technology of the design plan, it is unlikely to be infinitely short, so everyone should ask for one that is as short as possible, because the field lens with a short lens focal length is shot deep and the wire frame is thin. Another thing to note is that the smaller the focal length of the lens, the smaller the relative aperture, so the higher the flatness of the surface of the laser-marked object is, so the surface of the object with fluctuation or arc is not suitable for use with a lens with a short focal length. Mirror to play. The focal length of the lens and the telephoto lens are long, so that a little fluctuation on the surface of the object is allowed, and it is not easy to harm the actual effect of the marking bottom. However, everyone should also note that the longer the focal length of the lens, the smaller the specific energy of the focus point will be, and the lighter the marking will be. Therefore, we should pay attention to choosing a laser generator with a larger output power to match the equipment.

The fourth is about the light spot. Under normal circumstances, the scanning galvanometer of our laser cutting plotter is generally 12 light spots, so our field lens can choose 12 light spots. However, some customers buy field mirrors for scanning galvanometer automatic welding machines. The scanning galvanometers of automatic welding machines are generally large light spots, such as 20 light spots, 25 light spots, 30 light spots, and 36 light spots. Then everyone uses the same field lens as the supporting facilities. China's scanning galvanometer type automatic welding machine has such a problem, most of which is because the field lens with a large spot cannot be found. The field lens with small light spot will burn out at once under the condition of high power as the automatic welding machine.

(This article is edited by the editor, please be sure to indicate the source:)

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