Polygon Mirror Lightguide for Line-Width Laser Irradiation Offset
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Solution Overview
Problem
Existing light guide devices cannot distribute the position of an irradiated area in the line width direction without moving the irradiation target, as they lack the necessary configuration to achieve this functionality.
Innovation Solution
A light guide device comprising a first light guide part, a rotatable polygon mirror with a regular polygonal reflective surface, and an adjustment part that changes the position and orientation of optical components to offset the optical axis of the light incident on the polygon mirror, allowing the irradiated area to be distributed in the line width direction without moving the irradiation target.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional light guide device with a polygon mirror is used to scan light along a straight scanning line, then the optical axis of the irradiation light can be maintained, but the position of the irradiated area cannot be distributed in the line width direction without moving the irradiation target
Solution Approach 1:
The optical system is segmented into three distinct light guide parts (first, second, and third) with different functions. The first light guide part directs light to the polygon mirror, the second light guide part receives reflected light, and the third light guide part redirects light to achieve offset irradiation. This segmentation allows each component to be optimized for its specific function while collectively achieving the capability to distribute the irradiated area position without moving the target.
Solution Approach 2:
The second light guide part acts as an intermediary between the polygon mirror and the third light guide part. It receives light reflected from the polygon mirror and transfers it to the third light guide part, which then directs the light to the irradiation target with offset positioning. This intermediary structure enables the complex optical path required for distributing the irradiated area while maintaining system modularity.
2Area of stationary object
If the optical axis of incident light is offset in the rotation axis direction to distribute the irradiated area, then the line width direction coverage is improved, but the optical component positioning precision requirements increase
Solution Approach 1:
The system employs dynamic adjustment capabilities through the adjustment part, which can change the position and orientation of optical components in real-time. This allows the optical axis offset to be precisely controlled and adjusted during operation, compensating for manufacturing tolerances and enabling accurate distribution of the irradiated area across the line width direction without requiring extremely tight manufacturing precision.
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
Enables the distribution of the irradiated area's position in the line width direction without moving the irradiation target, allowing for a wider apparent line width and preventing process saturation during laser processing, thereby improving processing efficiency and accuracy.
Implementation Method 1
The first light guide part reflects and guides a light emitted from a light source
Implementation Method 2
The reflective part of the polygon mirror is configured to reflect the incident light so that the optical axis of the incident light offsets in the rotation axis direction
Implementation Method 3
The second light guide part reflects the light reflected by the reflective part of the polygon mirror and guides the light
Data Source
AI summary
A light guide device includes a first light guide part, a polygon mirror, a second light guide part, and an adjustment part. The first part reflects and guides a laser light emitted from a laser generator. The polygon mirror has a reflective part which reflects the light guided by the first part while the reflective part rotates. The second part reflects the light reflected at the reflective part and directs the light so that the light is illuminated to the workpiece at each reflective part, respectively. The adjustment part adjusts the position of the light incident on the polygon mirror in the rotation axis direction of the optical axis, thereby changing the positions of light incident on the irradiation target in the line width direction. The irradiation target is irradiated with the light while the position of the light in a line width direction.