7. Compensation for diameter variation
When the focusing optics move relative to the laser, and if collimation is not sufficient, a system must be implemented to compensate for the diameter variation at the entrance to the focusing optics.
Several systems are available, ranging from automatically-adjustable collimation to moving mirror systems that keep the laser-to-head distance constant. In larger systems, we have also considered mounting the laser on a platform that carries the head itself.
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Compensation for diameter variation
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