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Automated laser beam focus adjustment to compensate for temperature changes.
This technology allows the automated correction of a laser beam focus when the focal plane changes with temperature. Temperature sensors detect changes in the apparatus and optical components, and this input is used to correct the focal plane of the beam by repositioning a weak lens in the optical path. In this way the laser beam remains focussed on the surface to be scanned at any operating temperature.laser writing devices image setters plate beam focussed surface thick aluminum holding material imaged

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