Abstract
A light pipe based laser beam shaper is proposed as a low loss approach to transfer a Gaussian laser beam into a long line beam with uniform distribution along the line direction for the applications of illumination or material processing. A telecentric relay optics has been used for solving the radiometric issues in the wide angle optics. In addition, the length of the light pipe is used as a parameter for manipulating irradiance distribution at the outlet to compensate for the non-uniformity resulting from the partial reflection at the optical interface in the relay optics, so as to achieve a highly uniform line beam at the target plane. The proposed scheme provides an economical and versatile solution for the wide angle beam shaping problem.
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