Eight-Element Imaging Lens Layout for Wide-Angle Miniaturization
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Solution Overview
Problem
Conventional optical systems face challenges in achieving a balance among high image quality, low sensitivity, proper aperture size, miniaturization, and desirable field of view due to advancements in semiconductor technology and increasing functionality requirements.
Innovation Solution
An imaging lens system comprising eight lens elements, with specific configurations and refractive powers, including concave and convex surfaces, and optional features like aperture stops and light-folding elements, to optimize optical performance and reduce size while maintaining image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional optical systems are used, then manufacturing and assembly are simpler, but image quality deteriorates due to pixel size scaling and increased functionality requirements
Solution Approach 1:
The optical system is divided into multiple lens elements (at least six lens elements from first to sixth) with specific refractive power configurations. Each lens element contributes to correcting different types of optical aberrations, allowing the system to achieve high image quality through distributed functional segmentation rather than relying on a few complex elements.
Solution Approach 2:
Different lens elements are assigned specific refractive powers (positive or negative) and surface curvatures tailored to their positions in the optical path. For example, the first lens element has positive refractive power with specific curvature relationships (0.5 < R1/R2 < 2.0), while the fifth lens element has negative refractive power, creating localized optical corrections throughout the system.
2Volume of moving object
If the optical system is miniaturized, then device size is reduced, but achieving proper aperture size and field of view becomes more difficult
Solution Approach 1:
The patent establishes specific parameter ranges for lens elements to achieve miniaturization while maintaining optical performance. Key parameters include curvature radius ratios (0.5 < R1/R2 < 2.0, 0.5 < R3/R4 < 2.0), thickness-to-focal-length ratios (0.1 < CT1/f < 0.4, 0.1 < CT3/f < 0.4), and refractive power distributions that collectively enable compact design with proper aperture and field of view.
Solution Approach 2:
The optical system incorporates an aperture stop that can be positioned at different locations (between first and second lens elements, or between third and fourth lens elements) and adjusted to different opening sizes (F-number ranges), providing dynamic adaptability for different imaging requirements within the miniaturized structure.
3Use of energy by moving object
If the aperture size is increased, then more light is captured, but sensitivity increases and miniaturization becomes more difficult
Solution Approach 1:
The patent optimizes the F-number parameter within specific ranges (0.5 < F < 1.5 in some embodiments, or 1.0 < F < 2.0 in others) to balance light capture efficiency with compact size. This parameter optimization, combined with the refractive power distribution across multiple lens elements, enables adequate light gathering in a miniaturized configuration without excessive sensitivity.
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 system achieves a balance between image quality, sensitivity, aperture size, and field of view, enabling miniaturization and improved performance in electronic devices.
Implementation Method 1
An imaging lens system includes at least six lens elements from a first lens element to a sixth lens element
Data Source
AI summary
An imaging lens system includes eight lens elements which are, in order from an object side to an image side along an optical path: 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 and an eighth lens element. Each of the eight lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. The object-side surface of the third lens element is concave in a paraxial region thereof. When specific conditions are satisfied, the requirements of wide field of view, compact size and high image quality can be met by the imaging lens system, simultaneously.