18 June 1998 Design of diffractive beam-shaping elements for nonuniform illumination waves
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Abstract
A method for the design of diffractive beam-shaping elements is presented which extends the finite-element-meshes method proposed by Dresel et al. In particular, the modified method can be applied to non-uniform intensity distributions in the input and output planes. This extension is of practical significance due to the non-uniformity of real laser beam intensity distributions. The method is shown to result in so-called smooth phase functions which are desired for beam- shaping applications to overcome the well-known speckle problem. Transmission functions of diffractive phase-only elements have been computed solving beam-shaping problems of practical relevance. We have demonstrated by numerical simulation experiments that the computed elements perform the desired beam-shaping operations in good approximation.
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Andreas Hermerschmidt, Hans Joachim Eichler, Stephan Teiwes, Joerg Schwartz, "Design of diffractive beam-shaping elements for nonuniform illumination waves", Proc. SPIE 3291, Diffractive and Holographic Device Technologies and Applications V, (18 June 1998); doi: 10.1117/12.310592; https://doi.org/10.1117/12.310592
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