Dynamic Beam Shaping for Spherical Aberration and Dual-Beam Focusing
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Solution Overview
Problem
Traditional lens-based focusing of light beams results in longitudinal spherical aberration, leading to dispersed focal points and reduced energy density, affecting processing efficiency and precision in laser processing, and existing methods struggle to simultaneously correct spherical aberration and perform dual-beam splitting.
Innovation Solution
A dynamic beam adjustment device and method that utilizes a beam wavefront modulation module, beam splitting and combining modules, and a Fourier transform module to adjust and synthesize laser beams, enabling simultaneous beam splitting, aberration correction, and position offset, achieving a multi-branch optical waveguide path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a traditional lens is used to focus parallel light beams, then the light beams can be focused into a single point, but longitudinal spherical aberration occurs causing focal point dispersion and reduced energy density
Solution Approach 1:
The patent divides the single focused beam into multiple beams using beam splitting modules. Each beam can be independently focused and adjusted, allowing the system to overcome the spherical aberration limitation of traditional single-point focusing by distributing energy across multiple focal points that can be dynamically controlled
Solution Approach 2:
The patent employs dynamic adjustment mechanisms including adjustable lenses and beam steering modules that allow real-time modification of beam paths and focal points. This dynamic capability enables the system to correct spherical aberration by adaptively adjusting the position and shape of multiple beams to achieve optimal focusing
2Manufacturing precision
If a single beam incident method is used to correct spherical aberration, then aberration correction may be achieved, but beam splitting and dual-beam processing cannot be executed simultaneously
Solution Approach 1:
The patent designs an optical system that simultaneously performs multiple functions: beam splitting, aberration correction, and dual-beam processing all within a single integrated apparatus. The beam splitting module, combined with adjustable lenses and beam steering modules, enables the system to handle multiple beams independently while correcting aberrations, thus achieving both precision and efficiency
Solution Approach 2:
The patent utilizes adjustable parameters such as lens focal lengths, beam positions, and wavefront phases to simultaneously achieve aberration correction and enable dual-beam splitting. By dynamically changing these parameters, the system can optimize both the correction of spherical aberration and the execution of multi-beam processing operations
3Ease of manufacture
If parallel light beams pass through a lens with curvature, then focusing can be achieved, but beams far from the optical axis and beams closer to the optical axis converge at different points
Solution Approach 1:
The patent introduces beam steering modules and adjustable lenses as intermediary elements between the traditional lens and the workpiece. These intermediaries enable precise control over beam paths and focal points, compensating for the spherical aberration caused by the lens curvature and ensuring accurate focal point convergence
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enhances processing efficiency and precision by concentrating focal points and increasing energy density per unit area, allowing for the creation of desired waveguide structures like tapered or asymmetric waveguides.
Implementation Method 1
The beam wavefront modulation module receives the laser beam and adjusts wavefronts of the laser beam, so as to obtain an adjusted laser beam
Implementation Method 2
The Fourier transform module performs a Fourier transform on the combined beam to generate a transformed beam
Implementation Method 3
A focusing lens assembly receives the transformed beam after the Fourier transform and focuses the transformed beam into a processing beam
Data Source
AI summary
The laser processing system of the disclosure has a beam emitting module, a dynamic beam adjustment device, a focusing lens assembly, and a processing platform. The beam emitting module provides a laser beam. The dynamic beam adjustment device has a beam wavefront modulation module and a beam shaping unit. The focusing lens assembly receives the transformed beam after Fourier transform and focuses the transformed beam into a processing beam. The processing platform holds the workpiece and moves along a movement direction. The processing beam processes the interior of the workpiece along a modification direction when the processing platform moves along the movement direction.