What’s the advantages of adjustable Focus in Diode Laser Module?

Definition of Adjustable Focus

Adjustable focus modifies the laser beam's focal point by altering the lens-to-diode distance, changing spot size and energy density to optimize task performance. Short focus suits high-precision engraving, long focus suits thick material cutting, and medium focus suits general tasks.

Working Principle of Adjustable Focus

Adjustable focus is achieved by rotating the module’s threaded ring to shift the lens position, altering focal length. Some modules switch from 0.04mm short focus to 20mm cutting depth. Principles include:

• ·Short focus: Lens near diode, near-distance focus, larger spot, ideal for high-precision engraving.
• ·Long focus: Lens farther from diode, far-distance focus, smaller spot, ideal for cutting.
• ·Optical design: NEJE Micro lens Compression Technology

The laser beam’s focus forms a “beam waist” resembling an hourglass; optimal performance is achieved at the smallest waist point.

Applications of Adjustable Focus

1.Short Focus

Characteristics: Near-distance focus, high-precision engraving.

• Applications:

1. Fine engraving: Complex patterns on wood, stone, stainless steel
2.  Artistic creation: Personalized gifts, decorations, artworks.
3. Prototype design: High-precision marking on circuit boards, small parts.
4. Advantages: 0.04mm focus offers high resolution for detail-intensive tasks.

2.Long Focus

• Characteristics: Far-distance focus, high energy density, suitable for thick materials.
• Applications:

1. Wood and acrylic cutting: Single-pass cutting of 8mm birch wood.
2. Industrial manufacturing: Signs, furniture, structural components.
3. DIY projects: Cutting thick materials for models, decorations.
4. Advantages: Far-distance focus suits large or thick workpieces, ensuring high verticality and clean edges

3.Medium Focus

• Characteristics: Balanced spot size and energy distribution, suitable for general tasks.
• · Applications:

1. Light cutting: Paper, thin wood, plastic.
2. Medium-precision engraving: Marking or simple patterns on larger surfaces.
3. Daily DIY: Small projects, rapid prototyping.
4. Advantages: Minimal adjustments needed, efficient for multi-task scenarios.

Benefits of Adjustable Focus

• Versatility: Single device handles engraving, cutting, marking, reducing equipment needs
• Performance Optimization: Focus adjustment per material/task boosts efficiency and quality.
• User-Friendly: Simple knob adjustment, accessible to non-professionals .
• Cost-Effective: Eliminates need for multiple specialized lasers, lowering costs.

Adjustable-focus lasers offer greater flexibility than fixed-focus lasers but require more manual adjustments. Fixed-focus lasers are simpler for repetitive tasks.

Conclusion

Adjustable focus diode laser modules enable versatile applications from fine engraving to deep cutting via simple lens adjustments. Their flexibility, efficiency, and cost-effectiveness make them ideal for industrial, artistic, and DIY uses, with promising future applications.