Nine-Lens Optical Assembly with Inflection Points for Miniaturization
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Solution Overview
Problem
Conventional optical systems struggle to achieve a balance between high image quality, low sensitivity, appropriate aperture size, miniaturization, and desirable field of view, especially with the advancements in semiconductor technology and increasing functionality requirements.
Innovation Solution
The optical image lens assembly consists of nine lens elements, with specific refractive powers and surface shapes, including positive and negative refractive powers, concave and convex surfaces, and inflection points, to optimize imaging quality and control light paths effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of lens elements is increased to improve image quality, then image quality is improved, but device complexity and size increase
Solution Approach 1:
The lens assembly is divided into nine distinct lens elements with specific refractive powers and surface shapes, allowing each element to contribute to correcting specific aberrations while maintaining overall system performance. The segmentation of functions across multiple elements enables high image quality without requiring excessive complexity in each individual element.
Solution Approach 2:
Different lens elements are designed with specific local properties: the first lens element has positive refractive power with an inflection point on its object-side surface, the second has negative refractive power, and subsequent elements have tailored surface curvatures and inflection points. This local optimization of each element's properties contributes to overall image quality while controlling total system complexity.
2Use of energy by moving object
If the aperture size is increased to improve light gathering, then light gathering capability is improved, but sensitivity control becomes difficult
Solution Approach 1:
The lens assembly employs specific parameter relationships including the Abbe number constraint (5 ≤ NV40 ≤ 9) and the curvature radius ratios (0.05 ≤ |R15/R16| ≤ 0.50) to optimize the balance between aperture characteristics and sensitivity. These parameter constraints enable the system to maintain appropriate sensitivity control while achieving sufficient light gathering capability through the nine-element design.
3Volume of moving object
If the lens assembly is miniaturized to reduce device size, then device size is reduced, but field of view and image quality become difficult to maintain
Solution Approach 1:
The lens elements utilize aspheric surfaces with inflection points to achieve compact miniaturization while maintaining desirable field of view. The object-side surface of the first lens element and the image-side surface of the ninth lens element both feature inflection points that enable effective light routing in a compact configuration, achieving a maximum field of view of at least 60 degrees without compromising image quality.
Solution Approach 2:
The patent employs complex three-dimensional surface profiles with inflection points on multiple lens elements, transforming the traditional two-dimensional surface curvature concept into three-dimensional aspheric geometry. This dimensional complexity in surface design enables miniaturization while preserving wide field of view and high image quality.
4Measurement precision
If the refractive power distribution is optimized to improve imaging quality, then imaging quality is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent establishes specific parameter ranges and relationships that balance imaging quality with manufacturability. The constraints on Abbe number (5 ≤ NV40 ≤ 9), curvature radius ratios (0.05 ≤ |R15/R16| ≤ 0.50), and the presence of inflection points on specific surfaces provide clear manufacturing targets that achieve high imaging quality while maintaining reasonable precision requirements for mass production.
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 enables the optical image lens assembly to achieve high image quality, miniaturization, and a suitable field of view while maintaining low sensitivity and appropriate aperture size, addressing the challenges faced by conventional systems.
Implementation Method 1
The first lens element has positive refractive power. The second lens element has negative refractive power.
Data Source
AI summary
An optical image lens assembly includes nine 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, an eighth lens element and a ninth lens element. Each of the nine lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. The first lens element has positive refractive power. The second lens element has negative refractive power. The image-side surface of the ninth lens element is concave in a paraxial region thereof and has at least one inflection point.