Multi-element Lens System for Compact 3D Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current optical systems for capturing 3D information are limited in their ability to accurately detect depth and resolution, particularly in miniaturized forms, which hinders advanced applications like augmented reality and human-machine interaction.
Innovation Solution
A lens system comprising four to six lens elements with specific refractive powers, Abbe numbers, and surface configurations, including inflection points, is designed to operate within a 750 nm to 1500 nm wavelength range, optimizing focal lengths, axial distances, and material selection for improved optical properties and compactness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the lens system uses more lens elements to improve 3D detection precision, then measurement precision improves, but device complexity increases
Solution Approach 1:
The lens system is divided into multiple lens elements (four to six elements) with specific refractive powers and Abbe numbers. Each lens element is optimized for specific wavelength ranges (750-1500 nm), allowing the system to capture different depth information segments and combine them for high-precision 3D detection while maintaining manageable complexity through modular design
Solution Approach 2:
The patent specifies precise parameter ranges for each lens element including refractive power, Abbe number, focal length ratios (3.50<f/fi|<5.00), and axial distances (f/T34≥5.00). These parameter optimizations enable the multi-element system to achieve superior 3D detection precision without excessive complexity by carefully controlling optical properties within defined ranges
2Volume of moving object
If the lens system is miniaturized to reduce device size, then device complexity reduces, but measurement precision deteriorates
Solution Approach 1:
The lens elements are arranged in a compact nested configuration along the optical axis with optimized axial distances (T34 and other spacing parameters). The system fits multiple optical elements (4-6 elements) into a minimal volume by nesting them sequentially, achieving miniaturization while preserving depth detection precision through careful spacing control
Solution Approach 2:
The patent defines specific parameter relationships that enable miniaturization: focal length ratios (3.50<f/fi|<5.00) and axial distance ratios (f/T34≥5.00) are optimized to compress the overall system length. These parameter changes allow the lens system to maintain high 3D detection precision in a miniaturized form factor suitable for portable electronic devices
3Manufacturing precision
If the lens system uses lens elements with higher Abbe numbers to reduce chromatic aberration, then image quality improves, but manufacturing precision requirements increase
Solution Approach 1:
The patent specifies Abbe number ranges (40.0<Vdi<150.0) for each lens element that balance chromatic aberration control with manufacturing feasibility. These parameter selections optimize the trade-off between image quality (reduced chromatic aberration) and ease of manufacture, avoiding extreme material properties that would be difficult to fabricate while still achieving superior optical performance
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 lens system enhances 3D detection capabilities, improving image quality, reducing aberrations, and enabling compact, high-performance optical solutions for applications such as augmented reality and human-machine interaction.
Implementation Method 1
The lens system includes four to six lens elements... At least one lens element of the lens system has an Abbe number smaller than 26.0... When an axial distance between an outer-side surface of the first lens element and an inner-side surface of the inner lens element closest to the inner side of the lens system is TD, the following condition is satisfied: 1.0 [mm]TD5.0 [mm]
Data Source
AI summary
An electronic device includes a lens system including four lens elements. the four lens elements are, in order from an outer side to an inner side, a first lens element, a second lens element, a third lens element and a fourth lens element. The second lens element has negative refractive power. The fourth lens element has positive refractive power. At least one surface of the four lens elements has at least one inflection point. A projection device and a detecting module of the electronic device including the lens system are also disclosed.