Infrared Laser Head Explained: Enabling True Metal Engraving

In a complete laser engraving system, the honeycomb panel improves backside quality, the air assist pump enhances engraving stability, and the fume purifier ensures a clean working environment. However, the component that truly determines whether metal engraving is possible is the laser head itself.

This article focuses on the infrared laser head (commonly referred to as the red laser head), explaining how it works, why it is essential for stainless steel engraving, and how it fundamentally differs from a blue diode laser head.

How the Infrared Laser Head Works

Infrared laser heads operate at a wavelength of 1064nm, which has a very high absorption rate on metal surfaces. Instead of reflecting the laser energy, stainless steel efficiently absorbs it, allowing precise interaction with the material.

• Efficient energy transfer on stainless steel and metal surfaces
• Stable engraving lines with consistent depth
• Clear edges without whitening or burn marks

Real Performance on Stainless Steel

1. Permanent and High-Contrast Marking

When engraving stainless steel, the infrared laser can create controlled micro-structures or oxidation-based color changes, resulting in:

• Sharp logos and clean text
• Readable serial numbers and QR codes
• Durable decorative patterns

2. Common Stainless Steel Applications

• Stainless steel tumblers and insulated cups
• Metal pet tags, nameplates, and ID plates
• Tools, knives, and industrial components
• Customized metal gifts and branding products

Infrared Laser vs Blue Diode Laser

Infrared Laser Engraving Demonstration

Who Should Choose an Infrared Laser Head?

• Users who need stainless steel or metal engraving capability
• Businesses offering customized metal products
• Users looking to expand from hobby use to commercial production

Actual engraving results depend on power, speed, and material surface condition. Testing is recommended before production use.