When choosing a field lens for a laser marking machine, three aspects need to be considered: it must be matched with the equipment used, matched with the marking requirements, and matched with the galvanometer.

When purchasing, we need to choose according to the following aspects:

1. What long wavelength field lens is needed? 

Generally, the wavelength can be matched with the machine. Many customers do not know the wavelength of their machine. The following Fulan Laser tells you, what is the wavelength of the equipment you are using:

CO2 laser marking airport mirrors are usually 10.6um: F-Theta scanning field mirror CO2 10.6um;

The wavelength of semiconductor and fiber laser marking machine is 1064nm: F-Theta scanning field lens 1064nm;

The wavelength of the green laser marking machine is 532nm: F-Theta scanning field lens 532nm;

The wavelength of the UV laser marking machine is 355nm: F-Theta scanning field lens 355nm.

2. How big a field lens is needed? 

Usually, you can choose the one that matches the equipment, for example: the galvanometer of our marking machine has a 12mm spot, and you can choose a field lens of 12mm.

3. How much large format field lens is needed?

Many customers want to buy a large-format field lens, so that it can be used in a large range, suitable for small products, and suitable for large products. However, customers often forget a problem. The larger the field lens size, the larger the corresponding field lens focal length and working distance, the greater the laser energy loss, and the laser energy attenuates greatly in the air. In other words, the field lens The larger the focal length, the thicker the line will be, and the shallower it will be on the surface of the material. Therefore, the size of the field lens should be selected to suit the marking material and line requirements, and the size cannot be blindly pursued. To

4. What is the focal length of the field lens?

In the case of the same format, due to the different design and processing capabilities of field lenses of various manufacturers, field lenses of the same format often appear, but the focal lengths produced are different. Foshan Fulan Laser believes that if the format is the same, the focal length should be as short as possible. Of course, due to the different design process, it is impossible to be infinitely short as the best, as short as possible, because the deeper the marking of the field lens with the short focal length, the thinner the line. To

5. What size of threaded field lens is needed?

We know that the bottom of the galvanometer is the field lens, so the thread of the field lens must be suitable for the galvanometer used. What if I can't find the corresponding field lens? Just find a thread conversion interface, usually manufacturers of marking machine cabinets have this kind of interface.

The above is the method of field lens selection shared by Fulan Laser. If you still don't know how to choose, you can consult Fulan Laser at any time.