Optical Imaging Lens Assemblies for Low Distortion
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Solution Overview
Problem
Designing an optical imaging lens that balances high image quality with low distortion while considering constraints of size and cost, particularly for applications in portable devices and automotive systems where temperature variations affect image quality.
Innovation Solution
The optical imaging lens is composed of multiple assemblies with specific refractive powers and surface configurations, including compound and single lenses, arranged along the optical axis to optimize focal lengths and surface shapes, with an aperture, infrared filter, and protective glass to reduce stray light and enhance image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a lens with good imaging quality is designed, then image quality is improved, but device complexity increases
Solution Approach 1:
The lens is divided into six optical assemblies with different refractive powers, where each assembly contains one or more lenses. This segmentation allows the system to achieve high imaging quality through coordinated optimization of individual assemblies while managing overall complexity through modular structure.
Solution Approach 2:
The lens employs compound lenses with at least two different types of glass materials having different refractive indices. This composite material approach enables correction of optical aberrations and achieves high imaging quality while controlling the number of individual lens elements.
2Measurement precision
If a lens with low distortion is designed, then imaging accuracy is improved, but device complexity increases
Solution Approach 1:
Different optical assemblies are designed with specific local functions - the first assembly provides positive refractive power for focus, the second and fourth assemblies use negative refractive power for distortion correction, and the fifth assembly provides additional positive refractive power. This localized functional assignment achieves low distortion while managing complexity through specialized design of individual components.
3Volume of moving object
If the lens is made smaller, then device size is reduced, but manufacturing precision becomes more difficult to achieve
Solution Approach 1:
The lens employs a nested arrangement where multiple lenses are combined into compact optical assemblies. The first, second, third, fourth, and fifth optical assemblies are positioned sequentially along the optical axis with the sixth assembly at the image plane, creating a space-efficient structure that maintains manufacturing feasibility through standardized assembly processes.
4Reliability
If the lens is designed for high performance across temperature variations, then reliability is improved, but device complexity increases
Solution Approach 1:
The lens design incorporates optical assemblies with specific refractive power ratios that are optimized for temperature compensation. The conditional expressions for focal lengths and refractive powers are designed to maintain stable imaging performance across temperature variations, achieving reliability through mathematical optimization rather than complex thermal compensation mechanisms.
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
This configuration effectively enhances image quality and minimizes distortion, meeting the requirements for high performance across varying temperatures and applications.
Implementation Method 1
an optical imaging lens, in order from an object side to an image side along an optical axis, including a first optical assembly having positive refractive power; second optical assembly; a third optical assembly; a fourth optical assembly having positive refractive power; a fifth optical assembly; and a sixth optical assembly having negative refractive power
Data Source
AI summary
An optical imaging lens, in order from an object side to an image side along an optical axis, includes a first optical assembly, a second optical assembly, a third optical assembly, a fourth optical assembly, a fifth optical assembly, and a sixth optical assembly. The first optical assembly has positive refractive power. The fourth optical assembly has positive refractive power. The sixth optical assembly has negative refractive power. Two of the first optical assembly, the second optical assembly, the third optical assembly, the fourth optical assembly, the fifth optical assembly, and the sixth optical assembly include a compound lens with at least two lenses, while the others are a single lens, thereby providing a better optical performance of high image quality and low distortion.