Design of Off-Axis Two-Mirror Laser-Shaping System with Freeform Surface

Hongxiang, 潘红响 Pan; Zhouping, 苏宙平 Su

doi:10.3788/lop57.070801

Cited by 4 publications

(2 citation statements)

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“…In order to realize beam shaping, many beam shaping methods have been proposed. Laser beam shaping methods include cutting aperture beam shaping, diffractive optical element beam shaping [10], birefringent lens beam shaping, liquid crystal spatial modulator beam shaping [11], freeform surfaces beam shaping [12][13], etc. Compared with other methods, the freeform beam shaping method has higher design freedom, simple design, simple optical system structure and easy installation and adjustment.…”

Section: Introductionmentioning

confidence: 99%

Design of annular beam shaping system based on freeform surface

Xing

Ma²,

Chen³

2023

International Conference on Optical Technology, Semiconductor Materials, and Devices (OTSMD 2022)

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Laser is widely used in manufacturing, information transmission, biotechnology and other fields,but these fields often need the input beam with specific intensity distribution, and the Gaussian beam needs beam shaping to achieve the required illuminance distribution.Annular flattned beam has great demand in satellite communication, laser high-speed welding and other fields.The existing beam shaping system needs to compensate off-axis aberration and chromatic aberration, and its design process and system structure are complex.In this paper, we propose a design method of coaxial reflection annular beam shaping system based on geometric optics principle.Through ray mapping method to establish a mapping relationship,through geometrical optics principle to derive the freeform surface equation.We constructed the beam shaping system of the double freeform mirror, which can realize the annular flattened beam with a uniformity of 96.35%.Compared with the existing beam shaping system, the coaxial double reflection system has fewer optical elements, more compact structure, less calculation of optical element structure, and avoids off-axis aberration and chromatic aberration under the condition of similar shaping uniformity.

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Section: Introductionmentioning

confidence: 99%

Design of annular beam shaping system based on freeform surface

Xing

Ma²,

Chen³

2023

International Conference on Optical Technology, Semiconductor Materials, and Devices (OTSMD 2022)

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show abstract

“…However, the numerical solution of the second-order nonlinear partial differential equation is always difficult. Pan Xianghong et al [10] proposed an off-axis double reflection free-form surface laser shaping system, which can not only control the uniform distribution of beam irradiance, but also control the wavefront and beam expansion rate. The reflective structure has the advantages of high energy utilization, high damage threshold, no dispersion, easy to change the beam direction and so on.…”

Section: Introductionmentioning

confidence: 99%