The patent-pending Optical Focus Control (OFC) feature is available for all 790 BeamDirector Systems, even as a retrofit to existing systems. OFC makes laser processing of 3D non-metallics, composites, and thermal barrier coated metals easy and accurate. The feature complements the Automatic Focus Control and provides new capabilities such as precision drilling of cooling holes in thermal barrier coated turbine engine components. It also contributes to improved quality by better controlling focus at the precise location of the drilled hole and to greater throughput with its faster response and wider working range. The feature eliminates the time to measure the distance between the laser focal point/gas assist nozzle and workpiece. In addition, the system operator has the ability to switch back and forth between OFC and AFC within part programs increasing versatility and production efficiencies. The feature has increased sensing frequency compared with capacitance-based sensors. This allows it to follow a surface under closed loop control at twice the speed of AFC while avoiding the need to find the surface location. OFC senses part surfaces inaccessible to conventional AFC nozzles and it eliminates side-sensing problems that can occur with nozzle-based sensors. Additional benefits include a wide sensor range for commonly used focal lengths. It enhances flexibility because it can be used on a range of materials, metal and non-metal, is reliable, and does not add weight, external cabling, or other appendages to the BeamDirector.

LaserDyne Systems Division
www.prima-na.com