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Optics with Multi-Spot Module

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Beam Splitting and Tailored Spots

With the Laserline multi-spot module, almost any desired spot geometry and intensity distribution can be realized. Besides beam splitting for the creation of several single spots, the module also allows for the adjustment of spot geometry as well as targeted manipulation of the intensity distribution within the spot. Here, the multi-spot module is configured in such a way that the focus meets exactly the process demands. Furthermore, parameters such as spot distance or distribution of power to the single spots can be finely adjusted.

Multi-spot Optics in Use

Triple Spot

A typical application of the Laserline multi-spot module is the triple spot method for brazing hot-galvanized steel sheets. The combination here of a homogeneous rectangular spot with two round pre-spots allows for the realization of high process speeds with high quality process results at the same time. This is made possible because of the two pre-spots that are used to ablate the galvanization and thus contribute to a calming of the brazing process. The Laserline OTS optics can be supplemented with the multi-spot module. This enables flexible adaptation of the optics for applications with unusual requirements for the focus geometry.

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Variable intensity distribution
Round pre-spots | Quadradical main spot


High Seam Quality

High speeds and attractive seams - the multi-spot module with spot-in-spot design enables efficient welding of asymmetrical and symmetrical seams with less spatters and adaptable penetration. The video illustrates the achievable improvements in welding quality by comparing conventional circular spots, homogenized rectangular spots and Laserline multi-spot technology in a spot-in-spot configuration.

Spot-in-spot versus Round Spot

Influencing the weld pool in the area close to the surface

  • Less dynamic with fewer spatter, pores and seam defects
  • Less rework
  • Smooth surface of the weld seam
  • Increased speed with reduced heat input
  • Larger process window

Temperature profile in the area close to the surface

  • The weld pool remains liquid for longer, resulting in less porosity
  • Decrease in hardness of the steel


Areas of Application with Multi-spot Module

Optics with a multi-spot module are often used in the automotive industry.

Multi-Spot Technology

Do you have questions about processing optics with customized spot geometries?

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