Laser Welding Optical Lenses
LECI supplies a complete range of optical lenses used in laser welding systems, including focusing lenses, collimating lenses, protective lenses, and reflective lenses. All products are manufactured from high-grade optical...
LECI supplies a complete range of optical lenses used in laser welding systems, including focusing lenses, collimating lenses, protective lenses, and reflective lenses. All products are manufactured from high-grade optical materials with excellent transmission, high thermal resistance, and outstanding durability—ensuring stable performance even in high-power welding environments.
Laser Welding Lenses
The lenses supplied by LECI are coated with advanced Anti-Reflection (AR) coatings or High-Reflective (HR) coatings depending on their function. These coatings reduce laser energy loss, minimize slag adhesion, prevent scratches, and significantly extend the lifespan of the optical system. High optical precision (Optical Grade) ensures accurate beam focusing, reduced beam distortion, and improved weld quality.
LECI offers a wide range of lens sizes and focal lengths such as F100, F120, F150, F200, as well as protective window sizes such as D18, D20, D22, D25, D30, D34, D40, making them compatible with most popular laser welding heads including WSX, Raytools, Qilin, SUP, and others.
In addition to standard sizes, LECI provides OEM customization services, delivering tailor-made optics for specific welding or cutting applications.
With more than 13 years of experience in the laser industry, LECI is committed to providing high-quality, highly stable optical components that optimize welding performance, reduce consumable costs, and enhance production quality. We also offer technical consulting, installation, and repair services for modern laser welding systems.
Laser Welding Lens Diagram and Components
Below are the main optical components used in laser welding heads:
Focusing Lens
A focusing lens concentrates the laser beam into a small focal point, creating a high-energy density required for welding. This lens directly affects penetration depth, beam stability, and weld quality.
Features:
High laser transmission
AR anti-reflection coating
Excellent heat resistance
High optical accuracy
LECI provides premium focusing lenses manufactured from high-grade optical materials and quality-controlled to meet high-power laser welding standards. Multi-layer AR coatings reduce energy loss, minimize localized heating, and prevent burn marks.
We supply various focal lengths such as F100, F120, F150, F200, compatible with WSX, Raytools, Qilin, SUP, and other leading brands. LECI also offers application-based lens selection consulting to help users achieve optimal welding performance and maximize optical system lifespan.
Collimating Lens
A collimating lens converts a pergent laser beam into a parallel one before it reaches the focusing lens. This stabilizes the beam diameter, improves focusing performance, and maintains consistent laser power across the optical path.
Benefits:
Reduced energy loss
Uniform beam quality
Higher stability in continuous welding operations
LECI supplies high-quality collimating lenses made from industrial-grade optical materials with excellent transmission and AR coatings to minimize reflectance. These lenses offer high thermal resistance and optical precision, and they are compatible with WSX, Raytools, Qilin, SUP, and other common laser welding heads. A variety of focal lengths and sizes are available for low- to high-power welding systems.
Reflective Lens / Laser Mirror
A reflective lens, or laser mirror, redirects the laser beam within the welding head or optical system. These mirrors use specialized high-reflective (HR) coatings engineered for fiber laser wavelengths, ensuring maximum laser reflection with minimal power loss.
Key features:
High reflectivity
Excellent thermal resistance
Low distortion
Minimal localized heating
LECI’s reflective lenses use industrial-grade optical substrates and HR coatings designed for high-power laser systems. They maintain beam stability, reduce distortion, and ensure long-term durability in continuous welding applications. Various sizes, thicknesses, and coating types are available for full compatibility with WSX, Raytools, Qilin, SUP, and similar welding head designs.
Protective Lens / Protective Window
The protective lens is placed in front of the welding head to shield the focusing and collimating lenses from metal spatter, dust, smoke, and back-reflection during welding. This consumable component protects critical optics, ensures a clean beam path, and maintains weld quality.
Advantages:
High transmission with multi-layer AR coating
Scratch resistance and thermal stability
Reduced slag adhesion
Easy and quick to replace
LECI supplies high-performance protective lenses made from specialized optical materials with multi-layer AR coatings. These lenses minimize power loss, resist contamination, and extend the lifespan of the entire optical system.
Contact infomation:
LECI Co., Ltd
Room 1901, Saigon Trade Center, No. 37 Ton Duc Thang Street, Saigon Ward, Ho Chi Minh City, Vietnam
Long Bien, Ha Noi, VN.
Phone: (+84) 901442689 (WhatsApp)
Hotline: 02822202988
Website: lecilaser.com
