As a Precision Optics Manufacturer, share with you.
Focusing mirror is one of the important parts of laser marking machine, the purpose is to focus the laser on the marking plane of the whole workpiece.
Laser Focusing Lens
1. Scanning range.
The larger the area that the lens can scan, the more popular it is of course. But if you blindly increase the scanning area, it will bring a lot of problems. Such as the light spot becomes thicker, the distortion increases and so on.
2. Focal length (it has a certain relationship with working distance, but not equal to working distance).
a. The scanning range is proportional to the focal length of the field lens-an increase in the scanning range will inevitably lead to an increase in the working distance. The lengthening of the working distance will inevitably lead to the loss of laser energy.
b. The diameter of the focused spot is proportional to the focal length. This means that when the scanning area reaches a certain level, the diameter of the spot obtained is very large, that is to say, the focus is not small enough, and the power density of the laser drops very quickly (the power density is inversely proportional to the second power of the spot diameter). Conducive to processing.
c. Since the F-Theta field lens uses the relationship of y'=f*θ to work, the actual values of θ and tgθ are still different. And as the focal length f increases, the degree of distortion will increase.
3. Working wavelength.
At present, most of the ones used in the market are 1064nm and 10600nm. But with the development of later lasers, 532nm, 355nm and 266nm field lenses will also have corresponding applications.
The main functions of the focusing lens are:
1. Improve the ability of the edge beam to enter the detector;
2. In the same main optical system, the additional field lens will reduce the area of the detector; if the same area of the detector is used, the field of view can be enlarged and the incident flux can be increased;
3. Make the non-uniform illumination on the photosensitive surface of the detector uniform.
Our company also has Laser Focusing Lens on sale, welcome to contact us.