The collimating lens ensures that the laser beam is straight and parallel before entering the focusing lens, which then concentrates it into a sharp spot for high-precision cutting or welding. Both lenses are essential for maintaining beam quality, energy efficiency, and accuracy in laser processing.
High-grade ZnSe or fused silica materials with AR coatings help to minimize energy loss and enhance lifespan. Choosing the right diameter and focal length based on your machine and application ensures optimal results.
Focusing & Collimating Lens – Specification
| Parameter | Focusing Lens | Collimating Lens |
|---|---|---|
| Material | ZnSe (Zinc Selenide) / Fused Silica | ZnSe (Zinc Selenide) / Fused Silica |
| Diameter | 18mm / 20mm / 25mm / 30mm / 37 | 18mm / 20mm / 25mm / 30mm / 37 |
| Focal Length (FL) | 100mm / 125mm / 150mm / 200mm | 75mm / 100mm / 125mm |
| Thickness | 2mm to 8mm (depends on model) | 2mm to 8mm |
| Coating | AR coating (10.6μm for CO2 / 1064nm for fiber) | Same as focusing lens |
| Transmission | ≥99.5% | ≥99.5% |
| Working Temp. | Up to 300°C | Up to 300°C |
| Surface Quality | 20-10 scratch-dig | 20-10 scratch-dig |
| Application | Laser Cutting / Welding / Engraving | Beam Collimation before focusing |
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