Optical Imaging Lens with Seven Elements for Compact System Length
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge in designing optical imaging lenses is to achieve a slim and thin size with good imaging quality, short system length, small f-number, and a large field of view, while minimizing distortion aberration and thermal stability issues.
Innovation Solution
The optical imaging lens is designed with seven lens elements, each with specific refracting power and surface shapes, including convex and concave regions, to optimize the system's parameters such as focal lengths, refractive indices, and air gaps, satisfying various inequalities to achieve the desired optical characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If more lens elements are added to improve imaging quality, then imaging quality is improved, but system length increases and the device becomes bulky
Solution Approach 1:
The patent applies nesting by placing the optical elements in a compact, nested arrangement where each lens element is positioned closely to the next, minimizing the overall system length while maintaining the seven-element structure for high imaging quality
Solution Approach 2:
The patent transitions from traditional linear optical path arrangements to a more compact three-dimensional configuration, utilizing vertical space and optimized spacing between elements to reduce the horizontal system length while preserving optical performance
2Manufacturing precision
If more lens elements are added to improve imaging quality, then imaging quality is improved, but the device size increases
Solution Approach 1:
The seven lens elements are arranged in a nested configuration where each element is tightly integrated with the next, minimizing the volume occupied by the optical system while maintaining high imaging quality through optimized element spacing and positioning
3Illumination intensity
If the f-number is reduced to facilitate light flux, then light flux is improved, but distortion aberration increases
Solution Approach 1:
Different regions of the lens elements (central and peripheral zones) are designed with different refractive indices and curvatures to locally optimize light flux transmission while controlling distortion aberration in specific areas of the optical path
Solution Approach 2:
The patent uses lens elements with different refractive indices and material compositions to achieve both high light flux transmission and aberration control, combining materials with complementary optical properties to balance brightness and image quality
4Area of stationary object
If the field of view is enlarged to meet market trends, then field of view is improved, but system length increases
Solution Approach 1:
The patent achieves a wide field of view by optimizing the angular distribution of light paths through carefully designed lens surface curvatures and spacing, allowing enlarged field coverage without proportionally increasing the linear 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 improved imaging quality, reduced system length, lower distortion aberration, and enhanced thermal stability, while allowing for a smaller f-number and larger field of view.
Implementation Method 1
Each of the first, second, third, fourth, fifth, sixth and seventh lens elements may also have an object-side surface facing toward the object side and allowing imaging rays to pass through. Each of the first, second, third, fourth, fifth, sixth and seventh lens elements may also have 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 seven lens elements positioned in an order from an object side to an image side. Through controlling convex or concave shape of surfaces of the lens elements and parameters to meet (EFL+ALT)/D67≤4.800, the optical imaging lens may shorten system length with a good imaging quality.