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A wedge-shaped optic is the heart of Berkeley Lab innovation.
At the heart of the Berkeley Lab innovation is a wedge-shaped optic with a 99% reflective front surface for the main beam, and a wedged rear surface to reflect a low-powered witness beam. Both reflected beams are brought to a focus at nearly the same distance along near-identical paths, so the witness beam undergoes the same motions as the main beam. Diagram: Berkeley Lab.
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