18 August 2005 Design and characteristic analysis of shaping optics for optical trepanning
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Optical trepanning is a new laser drilling method using an annular beam. The annular beams allow numerous irradiance profiles to supply laser energy to the workpiece and thus provide more flexibility in affecting the hole quality than a traditional circular laser beam. The refractive axicon system has been designed to generating a collimated annular beam. In this article, calculations of intensity distributions produced by this refractive system are made by evaluating the Kirchhoff-Fresnel diffraction. It is shown that the refractive system is able to transform a Gaussian beam into a full Gaussian annular beam. The base angle of the axicon lens, input laser beam diameter and intensity profiles are found to be important factors for the axcion refractive system. Their effects on the annular beam profiles are analyzed based on the numerical solutions of the diffraction patterns.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
D. Zeng, D. Zeng, W. P. Latham, W. P. Latham, A. Kar, A. Kar, "Design and characteristic analysis of shaping optics for optical trepanning", Proc. SPIE 5876, Laser Beam Shaping VI, 58760M (18 August 2005); doi: 10.1117/12.619020; https://doi.org/10.1117/12.619020


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