Convex-Concave Eight-Element Lens for Resolution and Aperture Stop
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Solution Overview
Problem
Existing optical imaging lenses face challenges in achieving high pixel number, high resolution, and large aperture stop while maintaining a compact size and image height, as traditional designs struggle to balance these factors effectively.
Innovation Solution
An optical imaging lens design comprising eight lens elements with specific convex and concave surface configurations and refracting powers, including positive and negative refracting powers for certain elements, to enhance resolution and aperture stop while maintaining a slim and compact form.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional optical imaging lens designs are used, then the system structure is simple, but the resolution and aperture stop cannot be simultaneously improved while maintaining compact size
Solution Approach 1:
The optical imaging lens is divided into eight separate lens elements with different refracting powers and surface configurations. This segmentation allows each element to contribute specifically to resolving optical aberrations, enabling high resolution imaging while maintaining a compact overall structure that would not be achievable with fewer, simpler elements.
Solution Approach 2:
Different lens elements are designed with specific local characteristics: the first lens element has positive refracting power with convex object-side and concave image-side surfaces, the second has negative refracting power, the third has positive refracting power, and so on. Each element's specific surface configuration (convex/concave) and refracting power are optimized for its local position in the optical path, allowing the system to achieve high resolution and large aperture stop simultaneously.
2Measurement precision
If the number of lens elements is increased to improve resolution, then the resolution and aperture stop are enhanced, but the system length increases
Solution Approach 1:
The eight lens elements are arranged in a nested sequence along the optical axis, with each element positioned to optimize the optical path. The compact arrangement allows the lens elements to be closely spaced while maintaining their individual functional requirements, achieving high resolution without proportionally increasing system length.
Solution Approach 2:
The patent specifies precise parameter ranges for each lens element including refracting power, surface curvature radii, thickness, and spacing. By optimizing these parameters, the system achieves high resolution with a compact form factor. For example, the first lens element has positive refracting power with specific convex/concave surface configurations, and the spacing between elements is carefully controlled to minimize overall length while maintaining imaging performance.
3Illumination intensity
If the aperture stop is enlarged to improve light gathering, then the light gathering ability is enhanced, but the manufacturing difficulty increases
Solution Approach 1:
The aperture stop is integrated into the first lens element which has positive refracting power and specific surface configurations (convex object-side, concave image-side). This local optimization allows the aperture stop to be precisely positioned and manufactured as part of the lens element structure, reducing overall manufacturing difficulty compared to separate aperture mechanisms.
4Quantity of substance
If the image height is increased to accommodate high pixel number, then the pixel number is improved, but the difficulty of design increases
Solution Approach 1:
The optical system is segmented into eight specialized lens elements, each contributing to the overall ability to resolve high pixel density. This segmentation distributes the design complexity across multiple elements rather than requiring a single complex element, enabling high pixel number accommodation through the collective optical power of the lens array.
Solution Approach 2:
The patent specifies optimized parameter ranges for each lens element including refracting powers, surface curvatures, and spacing that collectively enable high image height and pixel number accommodation. The first lens element's positive refracting power and specific surface configurations are particularly optimized to handle the requirements of high pixel density 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 design achieves increased resolution, enlarged aperture stop, and improved image height with good imaging quality, while optimizing system length and production yield.
Implementation Method 1
Through configuration of convex/concave surface shape of the eight lens elements, the optical imaging lens may increase resolution and enlarge aperture stop and image height at the same time
Data Source
AI summary
An optical imaging lens may include a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, a seventh lens element and an eighth lens element positioned in an order from an object side to an image side. Through designing concave and/or convex surfaces of the lens elements, the optical imaging lens may increase resolution, enlarge aperture stop and image height, and maintain well image quality.