Optical Tracking Light Path Reconstruction for Stray Light Control
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Solution Overview
Problem
Existing optical tracking systems face challenges in improving sensing stability while reducing costs, with issues related to stray light interference leading to misjudgment and reduced accuracy.
Innovation Solution
An optical tracking device incorporating a light shielding plate and light path reconstruction structure with micro structures to block stray light and reconstruct the light path, enhancing accuracy and reducing misjudgment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a light shielding plate and light path reconstruction structure are added to block stray light, then sensing stability and accuracy are improved, but device complexity increases
Solution Approach 1:
The light shielding function is segmented into multiple components: a light shielding plate positioned at the light source and a light path reconstruction structure with micro structures. This segmentation allows each component to address specific aspects of stray light interference independently, improving overall sensing stability while maintaining manageable structural complexity through modular design.
Solution Approach 2:
The light path reconstruction structure acts as an intermediary element between the light source and the sensing environment. Its micro structures reconstruct the light path in a controlled manner, mediating the interaction between the sensing light and potential interference sources, thereby improving sensing stability without requiring complete system redesign.
2Measurement precision
If micro structures are added to the light path reconstruction structure to reconstruct light paths, then measurement precision is improved, but manufacturing precision requirements increase
Solution Approach 1:
The light path reconstruction structure features micro structures only at specific locations where light path reconstruction is needed, rather than requiring precision throughout the entire component. This local quality approach concentrates manufacturing precision requirements to critical zones, improving tracking accuracy while reducing overall manufacturing complexity.
Solution Approach 2:
The micro structures in the light path reconstruction structure are designed with specific geometric parameters that can be optimized through simulation and testing. By carefully selecting and adjusting these parameters (such as micro structure size, spacing, and shape), the patent achieves improved tracking accuracy while accommodating standard manufacturing capabilities.
3Reliability
If the light path reconstruction structure overlaps the sensing light source to block unexpected light emission, then sensing stability is improved, but device complexity increases
Solution Approach 1:
The light path reconstruction structure is positioned to overlap with the sensing light source, merging the light emission function with the light path control function in a single spatial region. This merging reduces the need for separate, distributed optical components, thereby improving sensing stability while minimizing the increase in overall optical structure complexity.
Solution Approach 2:
The light path reconstruction structure serves multiple functions simultaneously: it reconstructs the light path, blocks unexpected light emission, and maintains the sensing light source positioning. This multi-functionality reduces the total number of components needed, improving sensing stability without proportionally increasing device complexity.
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 device effectively reduces stray light interference, improving sensing stability and accuracy by blocking unexpected light paths and reconstructing the light path, thereby enhancing tracking precision.
Implementation Method 1
The light shielding effect of the light shielding plate may block an unexpected light emission region and absorb the stray light
Implementation Method 2
the micro structures of the surfaces of the light path reconstruction structure may cause diffusion and reconstruction when the sensing light passes through the micro structures
Implementation Method 3
the micro structures of the surfaces of the light path reconstruction structure may cause diffusion and reconstruction when the sensing light passes through the micro structures
Data Source
AI summary
An optical tracking device includes a circuit board, a sensing light source, a light shielding plate, and a light path reconstruction structure. The sensing light source is electrically connected to the circuit board and is configured to emit sensing light. The light shielding plate is disposed on the sensing light source, and the light path reconstruction structure overlaps the sensing light source. The light path reconstruction structure has a first surface facing the sensing light source and a second surface away from the sensing light source. The first surface has a first micro structure, and the second surface has a second micro structure. The sensing light passes through the first micro structure and the second micro structure in sequence after being emitted from the sensing light source.