Laser Beam Focal Control for 3D Surface Alignment
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Solution Overview
Problem
Adjusting the focal positions of laser and guide beams during three-dimensional processing on complex surfaces is challenging due to the lack of effective adjustment mechanisms.
Innovation Solution
A laser processing device equipped with a scanning unit, a lens movement unit, and a controller that adjusts the focal position of the laser beam while maintaining the visible light beam's position fixed, allowing for precise alignment and adjustment of both beams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the focal positions of both laser beam and guide beam are adjusted simultaneously for three-dimensional processing surfaces, then the processing accuracy can be maintained, but the adjustment complexity and difficulty increase significantly
Solution Approach 1:
The patent divides the adjustment system into two independent parts: a first lens for adjusting the laser beam focal position and a second lens for adjusting the guide beam focal position. Each lens can be adjusted independently without affecting the other, thus maintaining processing accuracy while simplifying the adjustment operation for three-dimensional processing surfaces
Solution Approach 2:
The patent employs a single optical system that handles both laser beams and guide beams through shared components (scanning unit, optical path). This multi-functional design allows simultaneous adjustment of both beam types while reducing overall system complexity compared to separate independent systems
2Device complexity
If a single optical system is used for both laser beam and guide beam, then the system structure is simplified, but the adjustment flexibility for different beam types is reduced
Solution Approach 1:
Within the single optical system, the patent segments the focusing function into two independent lens units: a first lens specifically for laser beam focal adjustment and a second lens for guide beam focal adjustment. This segmentation maintains system simplicity while providing the necessary adjustment flexibility for different beam types
Solution Approach 2:
The patent implements movable lens mechanisms that allow dynamic adjustment of focal positions for both laser and guide beams. The lenses can be moved along the optical path to change focal distances, providing adaptability for different processing requirements while maintaining a unified optical structure
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
Facilitates easy adjustment and precise alignment of laser and visible light beams on three-dimensional surfaces, enhancing processing accuracy and simplifying the control process.
Implementation Method 1
When the laser beam passes through the lens, the controller controls the scanning unit to scan the laser beam and controls the lens movement unit to move the lens and change the focal position of the laser beam
Implementation Method 2
When the visible light beam passes through the lens, the controller controls the scanning unit to scan the visible light beam without moving the lens from a fixed position
Data Source
AI summary
A control device controls a scanning unit and a drive unit to scan laser light. In addition, the control device controls a focal point adjustment unit and a drive unit to adjust the focal position of the laser light. In a display mode in which a processing subject is irradiated with visible light, the control device controls the scanning unit and the drive unit to scan the visible light. The control device does not change an inter-lens distance of lenses of the focal point adjustment unit.