Seven-Lens Optical Assembly for 120-200° Ultra-Wide Field of View
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Solution Overview
Problem
Conventional ultra-wide-angle lenses face challenges in achieving a small size while maintaining high image quality due to aberration issues, particularly when attempting to achieve a maximum field of view equal to or greater than 130°.
Innovation Solution
An optical lens assembly comprising five or more plastic aspherical lenses, with specific refractive power configurations and surface shapes, including a first lens with negative power and aspherical surfaces on the seventh lens that are convex near the optical axis and concave in peripheral regions, satisfying field of view and image height ratios to optimize size and aberration correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional glass lenses are used to achieve ultra-wide field of view (≥130°), then image quality deteriorates due to aberration, but if smaller size is pursued, aberration control becomes even more difficult
Solution Approach 1:
The patent changes the material parameter from glass to plastic and modifies the surface geometry to aspherical shapes, enabling effective aberration control in a compact ultra-wide-angle lens assembly with field of view of 130° or more
Solution Approach 2:
The patent employs aspherical surfaces on multiple lenses (first, fourth, sixth, and seventh lenses) to correct spherical aberration and other optical distortions, enabling high image quality in the ultra-wide field of view configuration
2Adaptability or versatility
If ultra-wide field of view (≥130°) is achieved, then manufacturing complexity increases, but image quality deteriorates due to peripheral aberration
Solution Approach 1:
The patent uses aspherical surfaces on the first, fourth, sixth, and seventh lenses to correct spherical aberration and field curvature, maintaining high image quality across the ultra-wide field of view of 130° or more
Solution Approach 2:
The patent employs a composite lens structure combining plastic materials with aspherical surfaces, achieving both the required ultra-wide field of view and high manufacturing precision for peripheral 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 solution enables an ultra-wide-angle lens system with a field of view ranging from 120° to 200°, reducing manufacturing costs and weight, while effectively correcting aberrations and achieving a compact size.
Implementation Method 1
an object side surface or an image side surface of the seventh lens may include an aspherical shape
Data Source
AI summary
Disclosed are an optical lens assembly and an electronic device including the same.The disclosed optical lens assembly may include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged from an object side to an image side, the first lens may have a negative refractive power, an object side surface or an image side surface of the seventh lens may include an aspherical shape that is convex toward the object side in a region near an optical axis and is concave toward the object side in a peripheral region, and the optical lens assembly may have a field of view ranging from 120° to 200°.