The Crucial Function of the Fiber Laser Collimating Lens The fiber laser collimating lens is a fundamental optical component within the laser welding head, tasked with capturing the diverging light from the fiber cable and transforming it into a perfectly parallel beam. At Lasvio, our lenses are crafted from premium-grade synthetic fused silica, which offers an ultra-low absorption coefficient to prevent thermal lensing effects during high-power operation. A high-performance collimator is vital because any optical aberration at this stage will be magnified by the focusing lens, resulting in a distorted focal spot and inconsistent weld penetration. By upgrading to professional optics, you ensure that your welding system maintains a stable beam profile and maximum energy efficiency throughout the entire fabrication process.

Technical Specifications of the Fiber Laser Collimating Lens

Regarding the operational performance of these components, our internal optics are designed to support high-power fiber systems ranging from 1000W to 6000W. These parts feature a double-sided anti-reflective coating with a transmission rate exceeding 99.5 percent at the 1064nm to 1080nm wavelength. We offer various focal length options, typically 75mm, 100mm, or 125mm, to match the specific requirements of major brands such as Raytools, WSX, and Precitec. Each lens undergoes a rigorous surface accuracy test to ensure a flatness of $\lambda/10$, which is essential for minimizing spherical aberration. The robust damage threshold of our coatings ensures that the assembly can withstand long-duration industrial cycles without the risk of surface pitting.

Optimizing Weld Quality through Precise Collimation

Achieving a gold-standard weld seam depends heavily on the synergy between the collimating assembly and the final focusing stage. If the beam is not perfectly parallel, the focal point will shift during the welding process, causing the penetration depth to fluctuate and creating weak spots in the joint. By selecting the appropriate focal length ratio—such as a 100mm collimator paired with a 150mm focus lens—fabricators can fine-tune the energy density to suit different material thicknesses. This precision is especially critical when working with reflective metals like aluminum or brass, where a stable and concentrated beam is required to maintain the keyhole effect. Investing in high-grade optics is the most effective way to eliminate beam drift and ensure the structural integrity of every component.