Light Deflecting Device High Resolution Raster Scanning
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Solution Overview
Problem
Conventional light scanning devices face challenges in achieving high resolution raster scanning due to the mass of moving lenses, which limits their ability to operate at high frequencies, resulting in reduced scanning resolution.
Innovation Solution
A light deflecting device comprising a first optical element with a vibration applying part that vibrates its emissive end along a first direction, and a second optical element moving along a second direction at a lower speed, allowing for high-speed vibration and low-speed movement to achieve high resolution raster scanning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If lenses having relatively great mass move to perform light scanning, then light scanning function is achieved, but high frequency operation becomes difficult and scanning resolution is reduced
Solution Approach 1:
The patent divides the light scanning function into two independent parts: a first optical element (lens) that performs high-frequency vibration along a first direction, and a second optical element (prism) that performs low-speed movement along a second direction. This segmentation allows each element to be optimized for its specific function, with the first element being lightweight enough for high-frequency operation despite the overall scanning system requiring two components.
Solution Approach 2:
The patent employs dynamic vibration of the first optical element at high frequency along the first direction, combined with slower movement of the second optical element along the second direction. This dynamic approach enables the system to achieve high scanning frequency through the vibration component while maintaining the necessary light deflection capability through the movement component.
2Manufacturing precision
If a single optical element performs both high-speed vibration and low-speed movement, then device complexity is reduced, but achieving high resolution raster scanning becomes difficult
Solution Approach 1:
The patent segments the optical scanning function into two distinct elements: a first optical element for high-frequency vibration and a second optical element for low-speed movement. This segmentation enables each element to be specifically optimized for its motion profile, achieving high-resolution raster scanning that would be difficult to accomplish with a single element attempting to perform both functions simultaneously.
Solution Approach 2:
The patent utilizes two different directions for the optical elements' motions: the first optical element vibrates along a first direction at high frequency, while the second optical element moves along a second direction at lower speed. This dimensional separation allows the system to achieve complex raster scanning patterns through the combination of simple unidirectional motions, improving scanning resolution without requiring complex multi-axis mechanisms for each element.
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 enables a small-sized light deflecting device capable of performing high resolution raster scanning, improving scanning resolution and efficiency while maintaining a compact and lightweight design.
Implementation Method 1
a vibration applying part at an incident end portion of the first optical element and vibrating an emissive end portion of the first optical element along a first direction
Data Source
AI summary
A light deflecting device includes a first optical element, a vibration applying part at an incident end portion of the first optical element and vibrating an emissive end portion of the first optical element along a first direction, and a second optical element moving along a second direction different from the first direction with a speed lower than a speed of the first optical element.