Introduction: Why Precision Matters in Laser Processing
In laser-based manufacturing, every micron counts. Industries such as electronics, aerospace, and medical devices rely on lasers to create extremely fine features. But one common challenge stands in the way: distortion during scanning.
This is where F-theta 3D conjugate lenses come in. Specifically engineered to correct distortion, they ensure the laser spot remains uniform and precise—even on curved or irregular surfaces.
The result? Faster throughput, higher-quality results, and reduced costs.
F-theta Lens
What Makes F-theta Lenses Different?
Unlike standard optics, F-theta lenses are built to maintain a flat field and consistent spot size across the entire scan area.
Key Advantages
- Speed & Efficiency
Accurate focus on irregular surfaces improves processing speed, throughput, and cost efficiency.
- Versatility Across Materials
Compatible with wavelengths from 400–700 nm, these lenses can process metals, plastics, ceramics, and composites with equal precision.
- Micron-Level Precision
Ideal for microfabrication, fine engraving, and high-resolution marking.
- F-theta Lens Specifications:
- Focal Length: 5mm
- F Number: 5.6
- Wavelength Range: 400 – 700nm
- Image Height: 3.2mm
- Object Height: 10mm
- Working Distance: 100mm
- Back Focal Length: 18mm
- Lens Size: Φ9×L20mm
- Distortion: ＜0.1%
Real-World Applications
- Laser Marking & Engraving – Consistent detail even on irregular surfaces.
- Micromachining – Ultra-precise cutting and drilling.
- Semiconductor Manufacturing – Critical alignment and distortion-free precision.
- Aerospace Engineering – High-reliability processing for mission-critical components.
Performance Backed by Data
- MTF Analysis
With a measured MTF value of 0.8189 at 83.46 cycles/mm, the lens delivers excellent contrast and detail transfer.
- Spot Diagram
Spot sizes remain close to the Airy disk radius (4.095 μm), proving the lens’s sharp focusing ability.
- Field Curvature Plot
Minimal sagittal (0.0842 mm) and tangential (-0.0673 mm) deviations ensure sharp focus across the scan field.
Modulation Transfer Function (MTF) Analysis
Why Choose Shanghai Optics F-theta Lenses?
- Proven Precision: Distortion correction below 0.1% ensures reliable results.
- Compact & Compatible: Standardized specifications make integration seamless.
- Broad Utility: Works across industries, materials, and laser types.
- Built for Safety: Stable working distance supports automated systems.
Conclusion
Shanghai Optics’ F-theta 3D conjugate lenses set the benchmark for accuracy, speed, and adaptability in laser processing. Whether you’re engraving microchips, cutting aerospace components, or fabricating medical devices, these lenses ensure you achieve distortion-free results at scale.
Ready to upgrade your laser systems? Contact Shanghai Optics today to discuss how our F-theta lenses can transform your production line.
