Startnow 1064nm Laser Protective Lens | Fused Silica for Fiber Laser Cutting

Protect your fiber laser cutting machine's optics with a high-performance 1064nm laser protective lens made from fused silica. This replacement window is designed for use with Raytools, WSX, and Precitec laser cutting heads, ensuring your equipment stays clean and operational.

This protective lens acts as a critical barrier against debris, spatter, and fumes generated during the cutting process. By absorbing and deflecting back reflections, it prevents damage to the expensive internal optics of your laser cutting head. The result is consistent beam quality, fewer interruptions, and a longer lifespan for your machine's core components.

Engineered from high-purity fused silica (quartz), this lens offers excellent thermal stability and high transmittance at the 1064nm wavelength. Its plano (flat) design is simple to install and replace, making routine maintenance quick and straightforward. Whether you are cutting metal sheets or performing precision fabrication, this protective window helps maintain peak performance.

This lens is available in diameters from 18mm to 29mm to fit various laser cutting head models. It is a practical, cost-effective way to safeguard your investment and reduce downtime on the production floor.

Key Features and Benefits

- 1064nm wavelength optimized coating that delivers up to 99.5% transmittance for efficient laser power transmission

• Fused silica (quartz) substrate that withstands high thermal loads and resists thermal shock during prolonged operation

• Plano (flat) optical design that simplifies installation and ensures a secure fit inside the cutting head assembly

• Compatible with Raytools, WSX, and Precitec fiber laser cutting heads for versatile use across different machine brands

• Available in multiple diameter sizes (18mm to 29mm) to match your specific cutting head model

Who Is This For

- Fiber laser cutting machine operators who need a reliable replacement protective window for routine maintenance

• Workshop technicians and maintenance teams servicing Raytools, WSX, or Precitec cutting heads

• Fabrication shops running high-power 1064nm fiber lasers who want to extend the life of expensive internal optics

• Anyone upgrading or stocking spare protective lenses for industrial metal cutting applications

Usage Scenario

A metal fabrication shop runs a 6kW fiber laser cutter daily to process stainless steel sheets. Over time, the original protective window accumulates spatter and residue, causing a drop in cut quality. The operator swaps in this 1064nm fused silica lens, and the beam transmission returns to full power. The cuts become clean again, and the internal focusing lens remains protected from debris. The replacement takes only a few minutes, minimizing downtime.

Micro Comparison

Unlike standard glass windows that can crack under high thermal stress, this fused silica lens offers superior heat resistance and clarity at 1064nm. Many generic windows lack the specific anti-reflective coating needed for fiber lasers, leading to power loss. This lens is purpose-built for fiber laser cutting heads, providing the transmittance and durability required for continuous industrial use.

Specifications

- Material: Fused Silica (Quartz)

• Wavelength: 1064nm

• Transmittance: 99.5%

• Shape: Plano (Flat)

• Diameter Options: 18mm, 19mm, 20mm, 25mm, 28mm, 29mm (select your size)

• Compatible Heads: Raytools, WSX, Precitec fiber laser cutting heads

Size Guide

Please allow 1-3 cm / 0.4-1.2 in difference due to manual measurement. Confirm your cutting head model and required diameter before ordering. Common sizes include 28mm x 4mm thickness and 25mm x 3mm thickness.

Package Includes

- 1 x 1064nm Laser Protective Lens (diameter as selected)

Why You Will Love It

This lens gives you peace of mind that your laser cutter's internal optics are safe from damage. It is an affordable, easy-to-replace part that keeps your machine running at full capacity. With high transmittance and durable fused silica construction, it helps you avoid costly repairs and production delays.

Questions and Answers

Question: Will this lens fit my Raytools cutting head?

Answer: Yes, this lens is compatible with Raytools, WSX, and Precitec fiber laser cutting heads. Check the diameter options to match your specific model.

Question: What is the transmittance of this protective window?

Answer: The transmittance is 99.5% at the 1064nm wavelength, ensuring minimal power loss during cutting.

Question: Can I use this lens for a 2000W fiber laser?

Answer: Yes, this fused silica lens is suitable for high-power fiber lasers, including 2000W systems and above, thanks to its thermal stability.

Question: How do I know which diameter to order?

Answer: Measure the inner diameter of your cutting head's lens holder. This lens is available in sizes from 18mm to 29mm. Common sizes are 28mm and 25mm.

Question: Is this lens anti-reflective coated?

Answer: Yes, the lens has a specialized coating for 1064nm that provides 99.5% transmittance and reduces back reflections.

Question: Can this lens be cleaned and reused?

Answer: Yes, you can clean it gently with a lens tissue and approved optical cleaner. Replace it if the coating shows visible damage or heavy pitting.