Eight-Element Optical Imaging Lens for Large Aperture and Resolution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing optical imaging lenses face challenges in achieving high resolution, large aperture stop, and compact size due to difficulties in design complexity and increased pixel count, particularly when incorporating a large aperture stop and enlarging image height.
Innovation Solution
An optical imaging lens design comprising eight lens elements with specific convex and concave surface shapes and refracting powers, including configurations such as negative refracting power for the second lens element, concave periphery regions, and convex optical axis regions for certain elements, to enhance resolution and image height while maintaining a slim and compact form.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the aperture stop is enlarged to accept more imaging rays, then the light gathering capability is improved, but the design difficulty increases significantly
Solution Approach 1:
The optical system is divided into multiple lens elements (first through eighth lens elements) with distinct functions. The first lens element has positive refracting power and handles initial light convergence, while subsequent elements with negative or positive powers sequentially correct aberrations and focus light. This segmentation allows each element to be optimized for specific tasks, making the overall design of a large aperture system more manageable and achievable.
Solution Approach 2:
Different lens elements are assigned different refracting powers and surface curvatures tailored to their specific positions and functions in the optical path. For example, the first lens element uses positive refracting power for initial convergence, while intermediate elements use negative powers for aberration correction. This localized optimization of optical properties enables the system to achieve high performance at large aperture without overwhelming design complexity.
2Measurement precision
If the image height is increased to achieve high resolution, then the image quality is improved, but the system length increases
Solution Approach 1:
The lens elements utilize aspherical surfaces with carefully designed curvatures to control light paths more efficiently than spherical surfaces. The aspherical shapes enable better focusing and aberration correction, allowing the system to achieve high resolution with a more compact arrangement of lens elements, thus reducing overall system length while maintaining large image height.
Solution Approach 2:
The patent employs precise control of optical parameters including refracting powers, surface curvatures, and spacing between lens elements. By optimizing these parameters, the system achieves high resolution performance with a compact form factor. The specific configuration of eight lens elements with controlled intervals allows efficient light propagation and focusing without requiring excessive system length.
3Measurement precision
If more lens elements are added to promote resolution and enlarge aperture stop, then the imaging performance is improved, but the device complexity increases
Solution Approach 1:
The optical system is divided into eight lens elements with distinct functional roles. The first lens element with positive refracting power handles initial light convergence, while subsequent elements alternate between negative and positive powers to sequentially correct different types of aberrations. This functional segmentation allows each element to be optimized for specific tasks, making the overall design of a high-resolution system more manageable despite the increased number of elements.
Solution Approach 2:
Each lens element is assigned specific optical properties including refracting power, surface curvature, and aspherical coefficients tailored to its position and function. This localized optimization enables the system to achieve high resolution performance by having each element contribute its specialized function, making the complex multi-element system more controllable and designable compared to a simpler system requiring higher overall performance from fewer elements.
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 also allowing for a compact size and efficient production yield.
Implementation Method 1
Each of the first, second, third, fourth, fifth, sixth, seventh and eighth lens elements may also have an object-side surface facing toward the object side and allowing imaging rays to pass through. Each of the first, second, third, fourth, fifth, sixth, seventh and eighth lens elements may also have an image-side surface facing toward the image side and allowing the imaging rays to pass through.
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.