Three-Element Lens Layout for Compact 3D Imaging Accuracy
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Solution Overview
Problem
Existing lens systems for electronic devices are limited to two-dimensional imaging, failing to capture and utilize 3-dimensional information effectively, leading to a gap between digital and real-world perceptions, which hinders immersive experiences and practical applications such as augmented reality and 3-dimensional modeling.
Innovation Solution
A lens system comprising three lens elements with specific refractive powers and configurations, including convex and concave surfaces, aspheric shapes, and air gaps, optimized by conditions on curvature radii, Abbe numbers, and focal lengths to enhance 3-dimensional imaging capabilities, miniaturization, and light convergence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a lens system is designed for 3-dimensional imaging with multiple lens elements, then imaging accuracy and depth information are improved, but device size and complexity increase
Solution Approach 1:
The lens system is divided into three distinct lens elements with specific refractive powers (positive, negative, positive) arranged in sequence. Each lens element is optimized for specific functions: the first lens element collects light from the object, the second lens element adjusts the light path, and the third lens element focuses the light onto the image sensor. This segmentation allows achieving 3D imaging capability while controlling overall system complexity through modular design.
Solution Approach 2:
Different regions of the lens system are assigned different optical properties. The first lens element has positive refractive power with a convex surface for light collection, the second lens element has negative refractive power for path adjustment, and the third lens element has positive refractive power for focusing. This local differentiation of optical characteristics enables precise control over light propagation to achieve 3D imaging accuracy.
2Measurement precision
If lens elements are added to improve 3-dimensional detection capability, then depth information and imaging resolution are improved, but aberrations and optical interference increase
Solution Approach 1:
The lens system optimizes specific parameters including the curvature radii of lens surfaces, the axial distances between lens elements, and the refractive indices of lens materials. By carefully adjusting these parameters, the system achieves proper light convergence for 3D imaging while minimizing optical aberrations. The specific condition on curvature radii and axial distances is designed to balance imaging quality with aberration reduction.
Solution Approach 2:
The lens system employs multiple lens elements with different refractive powers and optical characteristics. The combination of positive and negative refractive power elements creates a composite optical system that corrects aberrations introduced by individual lenses. This composite approach allows the system to achieve high depth detection accuracy while maintaining optical quality.
3Volume of moving object
If the lens system is miniaturized for electronic devices, then device integration is improved, but light convergence and illumination intensity decrease
Solution Approach 1:
The lens system transitions from traditional two-dimensional imaging to three-dimensional imaging capability by adding depth information through multiple lens elements. This dimensional enhancement allows the system to capture spatial information while maintaining a compact form factor suitable for electronic devices. The 3D imaging capability is achieved without proportionally increasing device volume.
Solution Approach 2:
The lens elements are designed with optimized curvature radii and axial distances to achieve proper light convergence within a compact structure. The specific parameter conditions ensure that even in a miniaturized configuration, the lens system maintains adequate light intensity and convergence quality for effective imaging.
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 improves 3-dimensional imaging accuracy, reduces aberrations, and miniaturizes the device while maintaining high resolution and illumination, enabling applications in augmented reality, face recognition, and gesture recognition.
Implementation Method 1
a first lens element with positive refractive power, a second lens element with negative refractive power, and a third lens element with positive refractive power
Data Source
AI summary
An electronic device includes a lens system. The lens system includes three lens elements, which are, in order from an outer side to an inner side: a first lens element, a second lens element and a third lens element. The first lens element with positive refractive power has an outer-side surface being convex in a paraxial region thereof. The second lens element has negative refractive power. The third lens element has positive refractive power.