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Beam Expander Testing

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Beam Expander Testing

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Laser beam expanders are used to increase a collimated input beam’s diameter for a wide range of laser applications. When characterizing the quality of a laser beam expander, it is critical to test its transmitted wavefront error or the deviation of the wavefront leaving the laser beam expander from its ideal shape. Analyzing transmitted wavefront error determines how aberrations affect the performance of the laser beam expander.

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