Six-Lens Optical Imaging System for Wide Angle and Compact Design
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Solution Overview
Problem
Conventional optical systems fail to simultaneously achieve a wide field of view, high image quality, good image recognition capability, and compact size, making them inadequate for modern electronic devices with camera functionalities.
Innovation Solution
An optical imaging lens system comprising six lens elements with specific refractive powers and surface configurations, including negative and positive refractive powers, convex and concave surfaces, and carefully optimized axial distances and thicknesses, to achieve a wide angle effect, high image quality, and compactness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If conventional optical systems are designed to achieve a wide field of view, then the angle of view increases, but the system size and complexity increase
Solution Approach 1:
The optical system is divided into six distinct lens elements with specific refractive powers (negative, positive, and mixed) arranged in a predetermined sequence. Each lens element has specifically designed surface curvatures (convex or concave in paraxial regions) to distribute optical functions, enabling wide field of view while controlling overall system complexity through modular design
Solution Approach 2:
The patent applies specific parameter constraints to achieve the contradiction resolution: axial distances between lens elements (T34, T56) are optimized relative to focal length (f), thickness ratios (CT5/CT6) are controlled, and curvature radii ratios ((R6+R7)/(R6-R7)) are specified. These parameter changes enable wide angle of view while maintaining compact system design
2Volume of moving object
If the optical system is miniaturized to reduce size, then compactness improves, but image quality and aperture stop deteriorate
Solution Approach 1:
The patent employs aspheric surfaces on multiple lens elements (including the first, third, fourth, fifth, and sixth lens elements) with dynamically optimized surface profiles defined by aspheric coefficients. This allows flexible control of light paths in a compact configuration while maintaining high image quality by correcting spherical aberration and other optical distortions that would otherwise require larger optical paths
Solution Approach 2:
Specific parameter relationships are established to balance miniaturization with image quality: the axial distance T34 between the third and fourth lens elements is constrained relative to focal length f, the thickness ratio CT5/CT6 of the fifth and sixth lens elements is controlled, and the curvature radius ratio (R6+R7)/(R6-R7) is specified. These parameter changes enable compact design while preserving optical performance
3Manufacturing precision
If more lens elements are added to improve image quality, then imaging functionality improves, but device complexity and size increase
Solution Approach 1:
Each of the six lens elements is designed to perform multiple optical functions simultaneously. For example, the fourth lens element with convex image-side surface and the sixth lens element with convex object-side surface contribute to both image quality correction and wide field of view achievement. This multi-functionality reduces the need for additional specialized elements, maintaining device complexity at an acceptable level while achieving high image quality
Solution Approach 2:
The patent optimizes the number and arrangement of lens elements through specific parameter constraints: axial distances (T34, T56) are optimized relative to focal length, thickness ratios (CT5/CT6) are controlled, and curvature relationships ((R6+R7)/(R6-R7)) are specified. These parameter changes enable six elements to achieve high image quality without requiring more elements, thus controlling 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 system provides a wide angle effect, high image quality, and compactness, enabling effective image recognition and capture in various applications, including low light conditions, while maintaining mechanical design flexibility and reducing chromatic aberration.
Implementation Method 1
The first lens element has negative refractive power. The fifth lens element has positive refractive power.
Data Source
AI summary
An optical imaging lens system includes six lens elements which are, in order from an object side to an image side: a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. The first lens element has negative refractive power. The fourth lens element has an image-side surface being convex in a paraxial region thereof. The fifth lens element has positive refractive power. The sixth lens element has an object-side surface being convex in a paraxial region thereof.