Nine-Lens Optical Imaging Layout for Low F-Number and High Image Height
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Solution Overview
Problem
Existing optical imaging lenses face challenges in achieving a slim and compact design with small Fno, great field of view, and high image height while maintaining good imaging quality.
Innovation Solution
An optical imaging lens comprising nine lens elements with specific refractive powers and surface shapes, including positive and negative refracting powers, convex and concave regions, and controlled thicknesses and air gaps, to reduce f-number and increase image height.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of lens elements is increased to improve imaging quality, then the device complexity increases
Solution Approach 1:
The optical system is divided into nine distinct lens elements with specific refractive power configurations (+-++−+−+−), where each lens element is segmented to perform specific optical functions. This segmentation allows the system to achieve complex optical performance (wide aperture, wide field of view, high image height) while maintaining manageable complexity through modular lens design
Solution Approach 2:
Different lens elements are assigned different refractive powers and surface shapes (convex/concave regions) to optimize specific optical characteristics. For example, the first lens element has positive refracting power with specific surface curvature to control aberrations, while subsequent elements have alternating positive and negative powers to adjust focal length and field of view. This local optimization of quality attributes resolves the contradiction between performance and complexity
2Illumination intensity
If the f-number is reduced to increase luminous flux, then the imaging quality may deteriorate
Solution Approach 1:
The system changes multiple optical parameters simultaneously: the first lens element has positive refracting power with specific surface curvature, the second lens element has negative refracting power, and subsequent elements have alternating powers. This coordinated parameter change allows the system to achieve both low f-number (high luminous flux) and high imaging quality by balancing the optical effects of each lens element
Solution Approach 2:
The optical system uses a composite lens configuration with nine different lens elements having different refractive powers and material properties. This composite structure allows the system to achieve both high luminous flux (low f-number) and good imaging quality by combining the advantages of different lens types in a single system
3Quantity of substance
If the image height is increased to provide great pixels, then the field of view may be reduced
Solution Approach 1:
The optical system segments the imaging function across nine lens elements, where each element contributes to both increasing image height and maintaining field of view. The alternating positive and negative refractive powers distribute the optical workload, allowing the system to achieve both great pixels (high image height) and wide field of view without sacrificing either
Solution Approach 2:
The system addresses the trade-off between image height and field of view by introducing multiple optical dimensions through nine lens elements with varying refractive powers. This multi-dimensional optical design allows simultaneous optimization of image height (for pixel quality) and field of view (for coverage area) that cannot be achieved with single-lens systems
4Length of moving object
If the lens elements are made thinner to reduce system length, then the optical performance may deteriorate
Solution Approach 1:
The lens elements are designed with non-uniform thickness distributions, where each lens element has optimized thickness at different radial positions. The first lens element has specific thickness to control aberrations, while subsequent elements have varying thickness to maintain optical performance. This local quality optimization allows thin overall system length while preserving high optical performance
Solution Approach 2:
The system changes the thickness parameters of each lens element according to its specific refractive power and optical function. By optimizing the thickness parameter for each of the nine lens elements individually, the system achieves compact overall length while maintaining the optical performance required for high-quality 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 solution achieves a compact design with improved imaging quality, increased image height, and enhanced field of view, while maintaining good optical performance.
Implementation Method 1
Each of the first, second, third, fourth, fifth, sixth, seventh, eighth and ninth lens element may also have an object-side surface facing toward the object side and allowing imaging rays to pass through and an image-side surface facing toward the image side and allowing the imaging rays to pass through
Data Source
AI summary
The present invention provides an optical imaging lens. The optical imaging lens comprises nine lens elements positioned in an order from an object side to an image side. Through controlling the convex or concave shape of the surfaces of the lens elements, the optical imaging lens may be provided with reduced f number and increased image height, along with good imaging quality.