Coherent Infrared Light Source Array for 3D Reconstruction
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Solution Overview
Problem
Existing three-dimensional reconstruction methods for mobile devices are either bulky, costly, or inefficient, failing to effectively remind users of proper posture to prevent eye damage from excessive mobile phone use.
Innovation Solution
A compact and cost-effective three-dimensional reconstruction system using an infrared light source array with coherent sub-light sources, a detector, and a calculation circuit to reconstruct a three-dimensional image of a target object, which is then used to assess the relative position of a user's eyes to a mobile device and issue warnings for improper use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional three-dimensional reconstruction methods are used in mobile devices, then measurement precision can be achieved, but device complexity and cost increase significantly
Solution Approach 1:
The patent replaces complex mechanical three-dimensional sensing systems with an optical interference-based measurement system. By using coherent light sources and interference patterns, the system achieves precise three-dimensional reconstruction without mechanical moving parts or complex sensor arrays, thus reducing device complexity while maintaining measurement precision.
Solution Approach 2:
The patent changes the measurement parameter from direct spatial measurement to optical phase difference measurement. By measuring the phase difference of interference fringes, the system can calculate three-dimensional coordinates with high precision. This parameter transformation simplifies the hardware requirements while achieving accurate three-dimensional reconstruction.
2Measurement precision
If traditional three-dimensional reconstruction hardware is deployed, then reconstruction accuracy is improved, but manufacturing cost increases
Solution Approach 1:
The patent employs inexpensive infrared LEDs as coherent light sources instead of expensive lasers, and uses standard infrared sensors that are widely available and low-cost. This substitution of expensive components with affordable alternatives maintains the core interference measurement functionality while dramatically reducing manufacturing costs for mobile device integration.
Solution Approach 2:
The patent uses software-based three-dimensional reconstruction algorithms that process optical interference patterns to generate three-dimensional models. This computational approach replaces the need for expensive dedicated three-dimensional sensing hardware, leveraging processing power instead of hardware complexity to achieve accurate reconstruction at lower manufacturing cost.
3Reliability
If existing eye protection reminder systems are implemented, then user eye health can be protected, but the system becomes bulky and inefficient
Solution Approach 1:
The patent integrates three-dimensional reconstruction capability into the mobile device's existing camera system, allowing the same hardware to serve both photography and eye protection monitoring functions. This multi-functionality eliminates the need for separate dedicated eye protection devices, improving system efficiency while maintaining reliable eye health monitoring through accurate three-dimensional posture assessment.
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 system provides accurate and efficient three-dimensional reconstruction, enabling effective eye protection by prompting users on correct mobile device usage, reducing the risk of visual fatigue and myopia.
Implementation Method 1
an infrared light source array, including a plurality of infrared sub-light sources, and each of the infrared sub-light sources emitting an infrared light, and different infrared sub-light sources being coherent light sources
Implementation Method 2
the reflected infrared light is a reflected light of an interference beam emitted by the coherent light source
Implementation Method 3
an infrared detector, configured to receive an infrared light reflected from a target object
Implementation Method 4
the infrared light source array further includes a collimating lens disposed at a light emitting side of the infrared sub-light source
Data Source
AI summary
A three-dimensional reconstruction system includes an infrared light source array including a plurality of infrared sub-light sources, and each of the infrared sub-light sources emitting an infrared light, and different infrared sub-light sources being coherent light sources, an infrared detector configured to receive an infrared light reflected from a target object, the reflected infrared light being a reflected light of an interference beam emitted by the coherent light source, a calculation circuit, configured to calculate a reference distance between a reflection point on the target object and the infrared sub-light source according to the reflected infrared light and the infrared light emitted by the infrared sub-light source, and a three-dimensional reconstruction circuit, configured to perform reconstruction of a three-dimensional image on the target object according to the plurality of reference distances.