Optical EngineeringTransforming a collimated straight line beam into a collimated spherical arc beam
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We present a lossless method and apparatus to transform a collimated straight line beam into a collimated spherical arc beam. This apparatus consists of two coaxial axicons, and the propagation direction of the incoming beams is parallel to the optical axis of the two axicons. The same method can also be used to transform a collimated rectangular beam into a collimated meniscus shaped beam.