Six-Element Optical Imaging Lens Compact Length Design
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Solution Overview
Problem
Conventional optical imaging lenses with six elements face challenges in achieving both reduced size and high image quality, with existing solutions either being too large or suffering from significant image distortion.
Innovation Solution
An optical imaging lens design with six elements, where the convex or concave shape of the lens elements' surfaces and refractive power are carefully controlled to satisfy specific ratios of air gaps and thicknesses, allowing for a shorter length while maintaining good optical characteristics such as high resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the optical imaging lens is designed with six lens elements to improve image quality, then the image resolution is improved, but the length and volume of the lens increase
Solution Approach 1:
The patent applies parameter changes by precisely controlling the refractive powers, curvature radii, and thicknesses of the six lens elements. Specific parameter ranges are defined (e.g., refractive power ratios, curvature radii relationships) to achieve compact lens length while maintaining high image resolution through optimized optical parameters
Solution Approach 2:
The patent utilizes aspherical surfaces for the lens elements, where the object-side and image-side surfaces of each lens element have specific curvature characteristics. The aspherical design allows for better control of light paths, enabling reduced lens length while maintaining high resolution by correcting optical aberrations more effectively than spherical surfaces
2Length of moving object
If the optical imaging lens is reduced in size to fit smaller mobile devices, then the device size is reduced, but the image quality deteriorates
Solution Approach 1:
The patent defines specific parameter ranges for the six lens elements including refractive power ratios (e.g., f2/f3 between -0.5 to -2.0), curvature radii relationships, and thickness proportions. These controlled parameter changes enable the lens to maintain high image quality while achieving a compact length suitable for small mobile devices
Solution Approach 2:
The six lens elements are designed with specific refractive power distributions where each element serves multiple optical functions. The combination of positive and negative refractive power elements allows the compact lens to correct multiple types of optical aberrations simultaneously, maintaining high image quality in a reduced size
3Measurement precision
If the optical imaging lens is designed with six lens elements for high specification products, then the image quality is improved, but the manufacturing complexity increases
Solution Approach 1:
The optical imaging lens is segmented into six distinct lens elements with specific refractive power assignments. This segmentation allows each element to be optimized for particular optical functions while maintaining overall system compactness. The divided structure enables better control of aberrations and facilitates manufacturing by allowing individual element optimization
Solution Approach 2:
The patent establishes specific parameter relationships and ranges for the six lens elements (refractive powers, curvature radii, thicknesses) that balance optical performance with manufacturing feasibility. These controlled parameter specifications provide clear manufacturing guidelines while achieving high image quality
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 effectively shortens the optical imaging lens length, reducing volume while preserving high image quality, making it suitable for smaller mobile devices without compromising optical performance.
Implementation Method 1
the first lens element has a positive refractive power; the object-side surface of the second lens element comprises a convex portion in a vicinity of the optical axis; the object-side surface of the third lens element comprises a concave portion in a vicinity of the optical axis
Data Source
AI summary
An optical imaging lens includes first, second, third, fourth, fifth, and sixth lens elements, each having an object-side surface facing toward an object side and an image-side surface facing toward an image side. The image-side surface of the first lens element includes a concave portion in a vicinity of a periphery of the first lens element. The optical imaging lens as a whole has only the six lens elements having refractive power. The ratio between the f-number of the optical imaging lens and thicknesses of the lens elements satisfies certain relations.