Sapphire Laser Machine Lenses

Focal Length: This is the distance from the lens to the optimal focus point. Shorter focal lengths (e.g., 1.5-inch or 2-inch for CO2CO sub 2CO2 lasers) produce a smaller, more intense spot, ideal for fine details and thin materials. Longer focal lengths (e.g., 3-inch or 4-inch) produce a larger spot but a deeper depth of field, better for cutting thicker materials. Material Compatibility: Lenses must be made of materials that are highly transparent to your specific laser's wavelength to minimize power loss and resist damage. ZnSeZnSeZnSe is used for the far-infrared CO2CO sub 2CO2 wavelength, while fused silica is common for the near-infrared fiber wavelength. Quality and Coatings: High-quality lenses feature anti-reflective (AR) coatings to reduce reflection losses and increase power transmission, improving efficiency and lifespan