Planetary Mirror Scanning for Stable Light Reflection Position
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Solution Overview
Problem
Existing light scanning devices suffer from fluctuations in the reflection position of light due to mirror rotation, leading to scanning distortion and a reduced processable range, which existing technologies fail to completely prevent.
Innovation Solution
An optical scanning device with a reflection unit that includes reflection members rotating and revolving simultaneously, using a planetary gear train to maintain a constant reflection position and prevent fluctuations, combining the advantages of polygon mirrors and mirror galvanometers.
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 constant angular velocity, but the reflection position of light fluctuates due to rotation, causing scanning distortion
Solution Approach 1:
The device is divided into two independent functional components: a polygon mirror for angular deflection and a reciprocating mirror for position stabilization. Each component performs its specific function without interfering with the other, allowing the polygon mirror to rotate at constant angular velocity while the reciprocating mirror compensates for position fluctuations.
Solution Approach 2:
The reciprocating mirror acts as an intermediary element between the rotating polygon mirror and the final light output. It mediates the effect of polygon mirror rotation by compensating for position fluctuations through its reciprocating motion, thereby stabilizing the reflection position while allowing the polygon mirror to maintain constant angular velocity.
2Manufacturing precision
If a reciprocating motion mechanism is added to suppress reflection position fluctuation, then the reflection position stability improves, but the device complexity increases
Solution Approach 1:
The reciprocating mirror serves multiple functions: it stabilizes the reflection position, maintains the scanning linearity, and works in conjunction with the polygon mirror to achieve both constant angular velocity and position stability. This multi-functionality reduces the need for additional separate mechanisms.
3Manufacturing precision
If a mirror galvanometer with reciprocating oscillating motion is used to prevent reflection position fluctuation, then the reflection position stability improves, but the scanning area becomes narrower and the processable range decreases
Solution Approach 1:
The system uses dynamic reciprocating motion of the mirror to actively compensate for position fluctuations during rotation. This dynamic adjustment allows the device to maintain position stability across a wider scanning area compared to static mirror galvanometer systems, thereby increasing the processable range.
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 ensures a constant reflection position, preventing scanning distortion and maintaining a wide processable range without the need for reciprocating motion, allowing efficient and distortion-free scanning.
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 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. Angular velocity of the revolution of the reflection member is equal to twice angular velocity of the rotation of the reflection member.