Nine-Element Optical Imaging Lens Aperture and Resolution
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Solution Overview
Problem
Portable electronic devices face challenges in designing optical imaging lenses with larger apertures and higher resolutions within limited system lengths, requiring innovative solutions to enhance image height and pixel count while maintaining image quality.
Innovation Solution
The optical imaging lens design incorporates a specific arrangement of nine lens elements with varying refracting powers and surface shapes, including convex and concave regions, to achieve a larger aperture and image height while improving resolution and chromatic aberration performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the aperture is increased to receive more imaging rays, then the light gathering capability is improved, but the system length increases and design difficulty doubles
Solution Approach 1:
The optical imaging lens is divided into nine lens elements with different refracting powers and surface shapes. Each lens element is specifically designed to handle certain aspects of light refraction and aberration correction, allowing the system to achieve large aperture performance while maintaining compact overall length through distributed functional segmentation.
Solution Approach 2:
Different lens elements are assigned different local optical properties including positive and negative refracting powers, convex and concave object-side surfaces, and varying image-side surface curvatures. This local differentiation allows each element to optimize specific optical functions, enabling the system to achieve high light gathering capability without proportionally increasing system length.
2Measurement precision
If the image height is increased to support higher pixel counts, then the resolution capability is improved, but the system length increases
Solution Approach 1:
The nine lens elements are segmented to handle different aspects of image formation and aberration control. Elements with positive refracting power contribute to image height and focal length, while elements with negative refracting power help control aberrations, allowing high resolution performance within compact dimensions through functional distribution.
Solution Approach 2:
The lens elements employ varying refracting powers (positive and negative), different surface curvatures (convex and concave), and specific aspheric coefficients to optimize the balance between image height and system length. By carefully adjusting these optical parameters, the system achieves high resolution capability without linearly increasing system length.
3Measurement precision
If multiple lens elements are added to improve resolution, then the imaging quality is improved, but the device complexity increases
Solution Approach 1:
The optical system is segmented into nine lens elements, each with specific refracting powers and surface characteristics. This segmentation allows complex optical functions to be distributed across multiple simpler elements, improving imaging quality while keeping each individual element relatively simple in design and manufacture.
Solution Approach 2:
Each lens element is designed with specific local optical properties (positive/negative refracting power, convex/concave surfaces) that address particular aberration types or imaging requirements. This localized optimization allows the system to achieve high imaging quality without requiring all elements to be equally complex, thereby managing overall device complexity.
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 design effectively provides a lens with a larger aperture, higher resolution, and improved image quality, addressing the challenges of system length constraints and enhancing the imaging capabilities of portable electronic devices.
Implementation Method 1
each of the first lens element to the ninth lens element includes an object-side surface facing the object side and allowing imaging rays to pass through and an image-side surface facing the image side and allowing the imaging rays to pass through
Data Source
AI summary
An optical imaging lens, including 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, an eighth lens element, and a ninth lens element disposed in sequence from an object side to an image side along an optical axis. An optical axis region of the object-side surface of the second lens element is convex. The fourth lens element has positive refracting power, and a periphery region of the image-side surface of the fourth lens element is concave. A periphery region of the object-side surface of the fifth lens element is concave. The seventh lens element has positive refracting power.