Study on the laser beam transformation and its measurement in laser processing

Ruifang Ye; Yuanqing Huang; Zihua Weng; Tianlin Hu; Shufen Lin; Huangping Yan; Zhaoxi Wu

doi:10.1117/12.791192

12 March 2008 Study on the laser beam transformation and its measurement in laser processing

Ruifang Ye, Yuanqing Huang, Zihua Weng, Tianlin Hu, Shufen Lin, Huangping Yan, Zhaoxi Wu

Proceedings Volume 6624, International Symposium on Photoelectronic Detection and Imaging 2007: Optoelectronic System Design, Manufacturing, and Testing; 66241X (2008) https://doi.org/10.1117/12.791192
Event: International Symposium on Photoelectronic Detection and Imaging: Technology and Applications 2007, 2007, Beijing, China

Abstract

The shape and energy distribution of laser beam directly define its applications in laser processing. In order to cater for different laser processing requirements, the input beam always needs to be transformed. The transformation between the solid beam and ring beam can be realized by the axicon-based optical devices. A beam transformation optical system, which uses a pair of positive axicon and negative axicon is designed and analyzed. The novelty of the optical system is not only that they can focus the laser beam on a ring pattern or solid beam pattern, but also that they can change the diameter of patter easily by adjusting the separation of the two conical lenses. The optical system is analyzed based on the geometry optical theory. By adjusting the separation of the convergent conical lens and the divergent conical lens, different shapes and the energy distributions are gained. At last, a measurement method of the beam profile is introduced which based on charge coupled device (CCD) The results show that the axicon-based beam transformations raise the effectiveness of laser and have a wide application prospect in laser processing field.

Citation Download Citation

Ruifang Ye, Yuanqing Huang, Zihua Weng, Tianlin Hu, Shufen Lin, Huangping Yan, and Zhaoxi Wu "Study on the laser beam transformation and its measurement in laser processing", Proc. SPIE 6624, International Symposium on Photoelectronic Detection and Imaging 2007: Optoelectronic System Design, Manufacturing, and Testing, 66241X (12 March 2008); https://doi.org/10.1117/12.791192

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KEYWORDS

Axicons

Laser processing

Solids

Charge-coupled devices

Optical components

Collimation

Refractive index

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