Polygon Mirror Lightguide for Width-Distributed Laser Scanning
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Solution Overview
Problem
Conventional light scanning technologies cannot disperse the position of an irradiated area in the line width direction without moving the irradiation target, limiting their application in processing circular or point-shaped areas and information reading.
Innovation Solution
A light guide device comprising a first light guide part, a rotatable polygon mirror with multiple reflective surfaces, and a second light guide part that reflects and guides the light to achieve offset irradiation positions along the rotation axis, allowing the irradiated area to be distributed in the width direction without moving the target.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional optical scanning apparatus uses a polygon mirror to scan light along a straight scanning line, then the light can be efficiently directed to a linear path, but the irradiated area cannot be dispersed in the line width direction without moving the irradiation target
Solution Approach 1:
The reflective parts are positioned asymmetrically in the rotation axis direction, with each reflective part offset from the others. This asymmetric positioning causes the reflected light to offset in the rotation axis direction, thereby dispersing the irradiated area in the line width direction while maintaining the straight scanning line functionality
Solution Approach 2:
The invention introduces a positional offset in the rotation axis direction (a dimension perpendicular to the scanning line direction) to achieve dispersion of the irradiated area. This adds a dimensional aspect to the light reflection that enables area distribution without moving the target or changing the scanning line path
2Stability of the object's composition
If the position of reflective parts in the rotation axis direction is made uniform, then the optical path length remains consistent, but the irradiated area position cannot be distributed in the width direction
Solution Approach 1:
The reflective parts are positioned asymmetrically in the rotation axis direction, with each reflective part offset from the others. This asymmetric positioning causes the reflected light to offset in the rotation axis direction, thereby dispersing the irradiated area in the line width direction while maintaining the straight scanning line functionality
Solution Approach 2:
The invention introduces a positional offset in the rotation axis direction (a dimension perpendicular to the scanning line direction) to achieve dispersion of the irradiated area. This adds a dimensional aspect to the light reflection that enables area distribution without moving the target or changing the scanning line path
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 in the width direction without moving the irradiation target, enhancing processing efficiency and preventing process saturation by maintaining a consistent optical path length and widening the apparent line width of the laser light.
Implementation Method 1
The first light guide part reflects and guides a light emitted from a light source
Implementation Method 2
The light guided by the first light guide part is reflected by the rotating reflective part
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, and a second light guide part. The first part reflects and guides a laser light emitted from a laser generator. The polygon mirror rotates and includes reflective parts. The reflective parts are arranged to form a regular polygonal reflective surface when viewed in a rotation axis direction, the polygon mirror reflecting the light guided by the first part by the reflective part while rotating. The second part reflects the light reflected at the reflective part and guides the light so that the light is irradiated to the workpiece at each of the reflective parts. The reflective part reflects the incident light so that the optical axis of the incident light offset in the rotation axis direction. At least two reflective parts differ from each other in position in the rotation axis direction.