Nine-Lens Optical Imaging System for Compact High-Resolution Design
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Solution Overview
Problem
Designing an optical imaging lens that is lightweight, thin, short, has a small f-number, large image height, and maintains good imaging quality is a challenging task due to the need for a larger field of view and higher pixel resolution.
Innovation Solution
A nine-lens element optical imaging lens design with specific refracting powers and surface shapes, including concave and convex regions, that satisfies certain optical conditions to achieve a balance between system length, image height, and imaging quality, with the distance from the object-side surface to the image plane being less than or equal to 15.000 mm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the lens system is designed with more lens elements to improve imaging quality and reduce aberration, then the imaging quality improves, but the system length and weight increase
Solution Approach 1:
The optical system is divided into nine distinct lens elements with specific positive and negative refracting powers, where each element contributes to correcting specific types of aberration while maintaining overall system compactness
Solution Approach 2:
The patent employs aspheric surfaces on multiple lens elements with specifically designed curvature parameters and conic constants, allowing precise control of light paths to reduce aberration without increasing system length
2Area of stationary object
If the field of view is enlarged to meet high pixel demand, then the image height increases, but the system length and complexity increase
Solution Approach 1:
Different regions of lens surfaces (optical axis region vs. periphery region) are designed with different curvature characteristics, allowing optimized light control for both central and peripheral rays to achieve large image height with controlled complexity
Solution Approach 2:
Aspheric surfaces with varying curvature radii are implemented on multiple lens elements, enabling precise control of off-axis light rays to achieve large field of view and image height while maintaining system compactness
3Use of energy by moving object
If the f-number is reduced to increase luminous flux, then the luminous flux improves, but the lens design complexity and aberration control difficulty increase
Solution Approach 1:
Multiple lens elements with alternating positive and negative refracting powers are combined in a specific configuration, where the cumulative effect of all elements works together to control aberrations while maintaining a small f-number for high luminous flux
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 improves aberration and distortion, allowing for good imaging quality while controlling system length, enabling a smaller f-number to increase luminous flux and meet high pixel and resolution demands.
Implementation Method 1
Each of the first lens element, second lens element, third lens element, fourth lens element, fifth lens element, sixth lens element, seventh lens element, eighth lens element and ninth lens element respectively has an object-side surface which faces toward the object side to allow imaging rays to pass through as well as an image-side surface which faces toward the image side to allow the imaging rays to pass through
Data Source
AI summary
An optical imaging lens includes a first lens element to a ninth lens element, and each lens element has an object-side surface and an image-side surface. A periphery region of the image-side surface of the first lens element is concave, the second lens element has negative refracting power, the eighth lens element has negative refracting power, and an optical axis region of the object-side surface of the ninth lens element is concave. Lens elements included by the optical imaging lens are only the nine lens elements described above, and the optical imaging lens satisfies the distance from the object-side surface of the first lens element to an image plane on the optical axis is less than or equal to 15.000 mm.