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Fiber Laser Lenses & Optical Consumables

OEM-compatible protective windows, focusing lenses, and collimating lenses for major fiber laser cutting heads.

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Compatible With Major Fiber Laser Heads

Machinist's Vault Lens are designed to fit a wide range of industry-standard fiber laser heads

TRUMPF

OEM-Compatible Fiber Laser Optics

Commonly Supported Systems

TruFiber® Laser Heads

TruDisk® Laser Systems

BEO Series Cutting Heads

BEO D30 / BEO D70

RAYTOOLS

OEM-Compatible Fiber Laser Optics

Commonly Supported Systems

BM109,BM110,BM111

BM114 / BM115

BT210 / BT220 (commonly seen in the field)

BODOR

OEM-Compatible Fiber Laser Optics

Commonly Supported Systems

Genius Laser Head including

GN12, GN6, GN3, GN2, GND12, GND6, GND3, GNT12, GNT6,

Don’t see your laser head brand listed?

Lens Protection

Protects focusing and collimating lenses from spatter, smoke, and debris in fiber laser cutting heads.

Thermal Stability

Fused silica optics maintain dimensional stability under high-power fiber laser cutting conditions.

Beam Clarity

High-transmittance AR coatings preserve beam quality and cutting accuracy across all power ranges.

Spatter Resistance

Advanced surface coatings resist molten metal splash and airborne contamination during cutting operations.

Sealed Fit

Precision tolerances ensure proper sealing inside Raytools, Precitec, Trumpf, and compatible laser heads.

Extended Service Life

Reduced replacement frequency lowers operating costs and maximizes laser machine uptime.

Designed to protect optics, maintain beam integrity, and maximize laser uptime in industrial fiber laser systems.

Fiber Laser Lenses for Industrial Cutting Applications in North America

What Is a Fiber Laser Protective Window?

A fiber laser protective window is the first line of defense inside a laser cutting head. Positioned above the focusing lens, it prevents spatter, smoke, and airborne debris from contaminating or damaging internal optics. In high-power fiber laser cutting applications, even minor contamination can lead to beam distortion, reduced cut quality, and costly downtime.

Machinist’s Vault protective windows are manufactured from optical-grade fused silica and feature multi-layer anti-reflection coatings optimized for fiber laser wavelengths. This ensures maximum transmittance while maintaining durability in demanding industrial environments commonly found across North American fabrication shops.

Focusing Lenses vs Collimating Lenses: What’s the Difference?

In a fiber laser cutting system, collimating lenses and focusing lenses work together to shape and direct the laser beam. The collimating lens aligns the beam into a parallel path after it exits the fiber, while the focusing lens concentrates that beam onto the workpiece for precise cutting.

Selecting the correct focusing lens fiber laser configuration depends on material thickness, power level, and desired cut quality. Using the wrong lens combination can reduce efficiency and shorten component lifespan.

Why Anti-Reflection (AR) Coatings Are Critical in Fiber Laser Optics

Anti-reflection (AR) coatings play a critical role in the performance and reliability of fiber laser optics. In high-power laser cutting systems, even small amounts of reflected energy can lead to heat buildup, beam distortion, and premature optic failure. AR-coated laser lenses are engineered to minimize surface reflections, allowing more laser energy to pass cleanly through the optic and reach the cutting zone.

Higher laser beam transmission directly improves cutting efficiency and consistency, especially at elevated power levels. By reducing reflective losses, AR coatings help maintain beam focus while lowering thermal stress on the lens substrate. This reduction in heat buildup significantly decreases the risk of coating burn-in, micro-cracking, and optical distortion over time.

For industrial fiber laser applications, properly applied multi-layer AR coatings also extend service life and reduce unplanned downtime. Whether used in protective windows, focusing lenses, or collimating lenses, AR coatings are essential for maintaining stable beam quality, protecting downstream optics, and maximizing overall system uptime in demanding production environments.

How Laser Power Affects Lens Selection

Laser power rating is one of the most important factors when selecting fiber laser cutting optics. As laser systems move from 3kW and 6kW into 12kW, 15kW, and 20kW fiber laser ranges, the thermal load placed on lenses increases dramatically. High power fiber laser lenses must be designed to handle this heat without cracking, warping, or experiencing coating failure.

Using a lens that is not rated for your machine’s output can lead to rapid degradation, including thermal stress fractures and AR coating damage. These failures often result in unstable cutting performance, poor edge quality, and costly downtime. Power rating is not just a recommendation—it is a requirement for safe and reliable operation.

Always match the laser cutting lens power rating to your machine’s maximum output, taking into account duty cycle and material thickness. Selecting the correct lens for your kW level ensures consistent beam quality, longer optic life, and protection of critical components inside the cutting head.