Understanding Thermal Lensing

When microscopic dust particles or cutting spatter settle on the protective cover glass of a high-power laser head, they absorb laser energy and heat the optic. This causes the glass to expand unevenly, shifting the focal point upward and degrading cut quality.

Best Practices for Cleanroom Optic Swaps

Always inspect protective lenses in a dust-free enclosure using 99.9% anhydrous isopropyl alcohol and lint-free optical swab sticks. Never blow shop air onto the optical cavity.