Laser Protective Window for Fiber Laser Cutting Machines

Laser Protective Window, also known as a Protective Lens / Protective Glass, is an important optical component installed in the laser cutting head to protect the internal focusing lens and optical system from dust, smoke, metal spatter, and other contaminants generated during laser cutting.

We supply high-quality Laser Protective Windows in Bangladesh for fiber laser cutting machines, available in different sizes, thicknesses, coatings, and specifications.

What is a Laser Protective Window?

The protective window is positioned between the laser cutting nozzle and the internal focusing optics. It acts as a protective barrier while allowing the laser beam to pass through with minimal optical loss.

It helps protect the expensive internal optics from:

• Metal spatter

• Cutting dust

• Smoke and fumes

• Molten material

• Contamination

• Heat and process debris

Applications

Laser Protective Windows are commonly used in:

• Fiber Laser Cutting Machines

• CNC Laser Cutting Machines

• Sheet Metal Laser Cutting

• Tube & Pipe Laser Cutting

• Stainless Steel Cutting

• Mild Steel Cutting

• Aluminium Cutting

• Brass & Copper Cutting

• High-Power Fiber Laser Systems

Common Protective Window Sizes

Protective windows are available in different dimensions depending on the laser cutting head.

Common sizes include:

• 18 × 2 mm

• 20 × 2 mm

• 21.5 × 2 mm

• 24 × 2 mm

• 27.9 × 4.1 mm

• 30 × 5 mm

• 34 × 5 mm

• 37 × 7 mm

• Other model-specific sizes

Exact dimensions must be matched with the laser cutting head model.

Protective Window Coating

High-quality protective windows are generally supplied with anti-reflection (AR) coating suitable for fiber laser wavelengths.

Depending on the specification, coatings may be designed for approximately 1030–1080 nm fiber laser applications.

The correct coating helps provide high transmission and reduce optical losses.

Why Quality Protective Window Matters

A good-quality protective window helps provide:

• High laser beam transmission

• Reliable optical protection

• Reduced contamination of internal optics

• Stable cutting performance

• Better protection for focusing lenses

• Longer service life of expensive laser optics

A contaminated or damaged protective window can affect beam transmission and cutting quality.

Signs of a Damaged Protective Window

Inspect or replace the protective window if you notice:

• Burn marks

• Black spots

• Cracks

• Scratches

• Cloudiness

• Heavy contamination

• Reduced cutting quality

• Unstable cutting

• Increased dross

• Reduced laser power at the workpiece

For high-power fiber lasers, regular inspection is especially important.

Protective Window Maintenance

Keep the protective window clean and inspect it regularly. Avoid touching the optical surface with bare fingers and use suitable optical cleaning materials.

If the window has severe contamination, coating damage, cracks, or burn marks, replacement is recommended rather than continuing operation with damaged optics.

Compatible Laser Cutting Heads

We can supply protective windows for various fiber laser cutting heads, including:

RayTools | Precitec | WSX | BOCI | Au3Tech | Ospri | Other Compatible Laser Heads

Compatibility should always be confirmed based on the exact laser head model and window dimensions.

Laser Protective Window Supplier in Bangladesh

We supply Fiber Laser Protective Windows in Bangladesh for laser machine manufacturers, industrial factories, laser cutting service providers, engineering companies, maintenance teams, and machine distributors.

We can assist with:

• Protective window identification

• Dimension matching

• Coating selection

• Laser head compatibility

• Replacement optics

• Bulk industrial supply

• Technical support

How to Select the Correct Protective Window?

Please provide:

1. Laser Cutting Head Model
2. Protective Window Dimensions
3. Laser Power
4. Laser Wavelength / Source
5. Existing Window Photo
6. Required Quantity

Our engineering team can help identify the suitable protective window for your laser cutting head.

Buy Laser Protective Window in Bangladesh

Looking for a Laser Protective Window for Fiber Laser Cutting Machine in Bangladesh?

Contact us for price, availability, technical specifications, compatibility checking, and bulk supply.

Request a Quotation

Send us your laser head model, existing protective window photo, or dimensions to get the correct product recommendation and quotation.