Optical Imaging Lens Compact System Length High Image Height
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Solution Overview
Problem
Designing an optical imaging lens that is slim and compact with a small f-number, large field of view, and high image height while maintaining good imaging quality is a challenge, as existing lenses often compromise on one or more of these factors.
Innovation Solution
The optical imaging lens is designed with eight lens elements, where specific refracting powers and surface shapes are optimized to satisfy certain inequalities, such as V5+V6+V7≥155 and V5+V6≥85, along with other parameter ratios, to achieve a shorter system length, lower f-number, and increased image height, thereby enhancing imaging quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of lens elements is increased to improve imaging quality, then imaging quality is improved, but system length increases
Solution Approach 1:
The patent applies parameter changes by precisely controlling the abbe numbers of specific lens elements (V5+V6+V7≥155) and optimizing surface curvatures and thicknesses to achieve compact system length while maintaining high imaging quality with eight lens elements
Solution Approach 2:
The optical system is segmented into eight distinct lens elements with specific refracting power assignments (positive for 1st, 3rd, 6th, 7th elements; negative for 2nd, 4th, 5th elements), allowing each element to contribute selectively to aberration correction and image quality enhancement without proportionally increasing system length
2Illumination intensity
If the f-number is decreased to increase luminous flux, then luminous flux is increased, but system complexity increases
Solution Approach 1:
The patent achieves small f-number (high luminous flux) by changing optical parameters including the abbe number constraints (V5+V6≥85, V5+V6+V7≥155) and optimizing the refracting powers and surface curvatures of the eight lens elements, thereby increasing light transmission without adding complex mechanical or optical components
3Measurement precision
If the image height is increased to provide great pixels and high resolution, then resolution is improved, but system length increases
Solution Approach 1:
The patent resolves this contradiction by changing key optical parameters: constraining the sum of abbe numbers (V5+V6+V7≥155), optimizing the distribution of refracting powers among lens elements, and adjusting surface curvatures to achieve large image height with compact system length
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 results in an optical imaging lens with a short system length, small f-number, and high image height, effectively addressing the challenge of achieving good imaging quality while maintaining a slim and compact form.
Implementation Method 1
Each of the first, second, third, fourth, fifth, sixth, seventh and eighth 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 eight 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 shortened system length, reduced f number, and increased image height, along with good imaging quality.