Six-Element Imaging Lens Assembly with Aspheric Curvature
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Solution Overview
Problem
Conventional optical systems face challenges in achieving a balance between high image quality, low sensitivity, proper aperture size, miniaturization, and a desirable field of view, making it difficult to meet the increasing functionality requirements of electronic devices with advanced imaging capabilities.
Innovation Solution
The proposed imaging optical lens assembly consists of six lens elements with specific surface curvatures and refractive powers, including a concave and convex paraxial regions, aspheric surfaces with inflection points, and an aperture stop, optimized to achieve a compact configuration and improved image quality while maintaining a balance between various optical parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of lens elements is increased to improve image quality and correct aberrations, then image quality is improved, but the overall length and complexity of the optical system increase
Solution Approach 1:
The optical system is divided into six distinct lens elements with specific curvature configurations. Each lens element contributes to correcting specific types of aberrations while maintaining a compact overall structure. The segmentation allows for optimized distribution of optical functions across multiple elements rather than requiring a single complex element.
Solution Approach 2:
The patent employs aspheric surfaces on multiple lens elements, including the sixth lens element which has an aspheric image-side surface with inflection points. These curved surfaces enable more effective aberration correction in a shorter optical path compared to traditional spherical surfaces, thus improving image quality without proportionally increasing system length.
2Use of energy by moving object
If the aperture size is increased to improve light gathering capability, then light gathering capability is improved, but the sensitivity and miniaturization requirements are compromised
Solution Approach 1:
The patent optimizes the aperture stop diameter and its position within the optical system to achieve the best balance between light gathering capability and sensitivity. By carefully selecting the aperture parameters and their locations relative to the lens elements, the system maximizes light transmission while maintaining low sensitivity to misalignment and environmental variations.
3Area of moving object
If the field of view is expanded to provide wider imaging coverage, then field of view is improved, but the distortion and aberration correction becomes more difficult
Solution Approach 1:
The patent utilizes aspheric surfaces on multiple lens elements, particularly the sixth lens element with its aspheric image-side surface containing inflection points. These complex curved surfaces are specifically designed to correct distortion and off-axis aberrations that become more pronounced with wider fields of view, enabling high image quality across the entire imaging area.
Solution Approach 2:
Each lens element in the six-element system is designed to perform multiple functions: focusing light, correcting spherical aberration, controlling coma, and reducing distortion. This multi-functionality allows the system to maintain wide field of view while effectively correcting various types of aberrations across the entire field.
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 enhances image quality, corrects aberrations, and provides a compact design that meets the requirements of modern electronic devices by optimizing the lens elements' positions and refractive powers, ensuring a suitable field of view and sensitivity.
Implementation Method 1
The six lens elements 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 and a sixth lens element. Each of the six lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side.
Data Source
AI summary
An imaging optical lens assembly includes six 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 and a sixth lens element. The first lens element has an object-side surface being concave in a paraxial region thereof and an image-side surface of the first lens element being convex in a paraxial region thereof. The third lens element has an image-side surface being concave in a paraxial region thereof. The sixth lens element has an image-side surface being concave in a paraxial region thereof. The image-side surface of the sixth lens element is aspheric and has at least one inflection point. At least one of the six lens elements is made of plastic material.