Rotation Mirror Pyramid Layout for Distortion-Free Light Scanning
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Solution Overview
Problem
Existing light reflection devices in laser processing systems suffer from scanning distortion due to fluctuations in the reflection position of light, which reduces the processable range of the irradiated object, and existing solutions like mirror galvanometers require acceleration and deceleration, narrowing the scanning area.
Innovation Solution
An optical scanning device with a rotation mirror comprising a first and second regular polygon pyramid, where the pyramids are rotated integrally with each other, and the reflection surfaces are arranged to maintain a constant reflection position of light, preventing fluctuations and distortion during scanning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a polygon mirror rotation device is used to scan light, then the light can be radiated while moving angularly at a constant angular velocity, but scanning distortion occurs due to fluctuations in the reflection position of the light at each side reflection surface
Solution Approach 1:
The polygon mirror is segmented into multiple planar mirrors arranged in a regular polygonal configuration. Each planar mirror independently reflects light, and by optimizing the number of mirrors and their angular positions, the system achieves both constant angular velocity radiation and stable reflection positions, eliminating scanning distortion.
Solution Approach 2:
The invention optimizes specific parameters including the number of planar mirrors, the base angle of the pyramid structure, and the distance between the light source and the polygon mirror. These parameter adjustments ensure that the reflection position remains stable while maintaining constant angular velocity operation.
2Manufacturing precision
If a mirror galvanometer is used to prevent reflection position fluctuation, then the reflection position can be stabilized, but the scanning area becomes narrower and the processable range decreases due to acceleration and deceleration requirements
Solution Approach 1:
The polygon mirror rotates continuously at a constant angular velocity, creating a periodic scanning pattern that covers a wide area. This periodic rotation eliminates the need for acceleration and deceleration phases required by mirror galvanometers, thereby maintaining both reflection position stability and a large processable range.
3Productivity
If planar mirrors are arranged in a regular polygonal shape and rotated, then light can be deflected efficiently, but scanning distortion occurs due to fluctuation in reflection position
Solution Approach 1:
The invention introduces asymmetric elements into the otherwise symmetric regular polygonal configuration by optimizing the base angle of the pyramid structure and the positioning of planar mirrors. This asymmetric optimization compensates for the inherent symmetry-induced fluctuations, maintaining both high deflection efficiency and scanning accuracy.
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
This configuration allows for stable and efficient scanning without reducing the processable range, maintaining a constant reflection position and preventing distortion, similar to the advantages of both polygon mirrors and mirror galvanometers.
Implementation Method 1
a light reflection device that reflects incident light so as to deflect it
Data Source
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AI summary
A light reflection device comprises a motor and a reflection member having a reflection surface that is formed in a planar shape. The reflection surface reflects incident light. The reflection member performs a revolution and a rotation simultaneously. A direction of the revolution of the reflection member and a direction of the rotation of the reflection member are the same. The motor drives the reflection member so that the angular velocity of the revolution of the reflection member is equal to twice angular velocity of the rotation of the reflection member.