Three-Lens Optical Assembly Balancing Image Quality and Compact Volume
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Solution Overview
Problem
Conventional optical lens assemblies face challenges in balancing image quality, sensitivity, aperture size, volume, and field of view, making it difficult to meet the diverse requirements of modern electronic devices with compact size.
Innovation Solution
An image capturing optical lens assembly comprising three lens elements with specific refractive powers and surface shapes, including a first lens element with positive refractive power, a second lens element with negative refractive power, and a third lens element with adjusted surface curvatures, optimized to satisfy conditions such as axial distances, central thicknesses, and focal lengths for compactness and high image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of lens elements is increased to improve image quality, then image quality is improved, but the volume and complexity of the optical lens assembly increase
Solution Approach 1:
The patent applies parameter changes by precisely controlling the refractive powers, curvatures, and axial distances of each lens element. The third lens element has a concave object-side surface and convex image-side surface with specific curvature relationships, and the axial distances between elements are optimized to achieve high image quality with only three elements, avoiding the need for more elements that would increase volume.
Solution Approach 2:
The patent uses composite material principles by combining lens elements with different refractive powers and material properties. The first lens element has positive refractive power, the second has negative refractive power, and the third has positive refractive power with specific surface curvatures. This composite arrangement of elements with different optical properties achieves superior image quality correction while maintaining a compact three-element structure.
2Illumination intensity
If the aperture size is increased to improve sensitivity, then sensitivity is improved, but the volume of the optical lens assembly increases
Solution Approach 1:
The patent optimizes the focal length and f-number parameters to achieve high sensitivity without increasing volume. The specific focal length and aperture diameter relationships are carefully controlled, along with the axial distances between lens elements, to maximize light gathering efficiency within a compact form factor.
3Area of stationary object
If the field of view is widened to improve coverage, then field of view is improved, but the volume and complexity of the optical lens assembly increase
Solution Approach 1:
The patent controls the focal length and maximum image height parameters to achieve the desired field of view within a compact volume. The specific relationships between axial distances, focal length, and image height are optimized to maximize the field of view coverage without requiring a larger optical assembly.
4Volume of stationary object
If the axial distance between lens elements is reduced to compact the assembly, then volume is reduced, but image quality and aberration correction deteriorate
Solution Approach 1:
The patent achieves compact volume while maintaining image quality by precisely optimizing the axial distances between lens elements. The specific axial distance relationships are controlled to allow adequate space for aberration correction while keeping the overall assembly compact. The curvature relationships of the third lens element and the positioning of all elements are coordinated to achieve this balance.
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 solution enables a compact optical lens assembly that balances image quality, sensitivity, and field of view, while maintaining a telephoto configuration and reducing temperature influence, thus addressing the limitations of conventional designs.
Implementation Method 1
The second lens element has negative refractive power... The first lens element has positive refractive power... Each of the three lens elements has an object-side surface towards the object side and an image-side surface towards the image side
Data Source
AI summary
An image capturing optical lens assembly includes three lens elements, the three lens elements being, in order from an object side to an image side along an optical path, a first lens element, a second lens element and a third lens element. Each of the three lens elements has an object-side surface towards the object side and an image-side surface towards the image side. The second lens element has negative refractive power. The object-side surface of the third lens element is concave in a paraxial region thereof, and the image-side surface of the third lens element is convex in a paraxial region thereof. The image capturing optical lens assembly has a total of three lens elements.