Five-Lens Optical Assembly for Compact Wide-Angle Imaging
Find Innovative SolutionsGenerate Solutions
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 rapid technological advancements in semiconductor manufacturing and increasing functionality requirements.
Innovation Solution
A photographing optical lens assembly comprising five lens elements with specific refractive powers and surface configurations, including convex and concave surfaces with inflection points, is designed to optimize image quality and field of view while minimizing sensitivity and size, using glass or plastic materials with optional additives for light absorption and aspheric surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional optical systems are used, then manufacturing and assembly are simpler, but image quality and performance balance cannot be achieved across multiple requirements simultaneously
Solution Approach 1:
The optical system is divided into five distinct lens elements, each with specific refractive power and surface curvature characteristics. This segmentation allows each element to be optimized for specific aberration correction functions, enabling high image quality while maintaining manageable manufacturing complexity through standardized design parameters and ratios.
Solution Approach 2:
Each lens element is assigned specific local optical properties: the first element has positive refractive power with convex object-side surface, the second has negative refractive power, the third has positive refractive power with concave object-side surface, the fourth has negative refractive power, and the fifth has positive refractive power. This localized optimization of optical properties enables comprehensive aberration correction across different regions of the optical 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 difficult
Solution Approach 1:
The optical system employs dynamic parameter relationships where the axial distances between lens elements (T12, T23, T34, T45) are defined as ratios relative to the focal length f, allowing the system to maintain proper optical performance across different scale implementations. This dynamic scaling approach enables miniaturization while preserving aperture size and field of view characteristics.
Solution Approach 2:
The patent defines specific parameter ranges and ratios: focal lengths (f1, f2, f3, f4, f5) are constrained relative to the total focal length f, axial distances are defined as proportions of f, and surface curvatures are specified with particular signs and magnitudes. These parameter changes enable the system to achieve miniaturization while maintaining adaptable field of view and proper aperture characteristics through mathematical relationships rather than fixed dimensions.
3Productivity
If pixel size is scaled down in image sensors, then semiconductor manufacturing performance improves, but optical system sensitivity and aperture requirements become more challenging
Solution Approach 1:
The patent replaces simple spherical lens surfaces with aspheric surfaces defined by complex curvature equations and higher-order terms. This substitution of mechanical surface geometry enables precise control over light ray paths, allowing the optical system to maintain low sensitivity and proper aperture characteristics even when paired with scaled-down pixel sizes in image sensors, thereby accommodating improved semiconductor manufacturing performance.
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 lens assembly effectively corrects aberrations, reduces sensitivity, and balances size and field of view, enhancing image quality and flexibility in device design with improved manufacturing yield and reduced external environmental influence.
Implementation Method 1
Each of the five lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side, with specific refractive powers and surface configurations including convex and concave surfaces with inflection points
Data Source
AI summary
A photographing optical lens assembly includes five 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 and a fifth lens element. Each of the five lens elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. The image-side surface of the second lens element is concave in a paraxial region thereof. The third lens element has negative refractive power. The fourth lens element has positive refractive power. The object-side surface of the fifth lens element is convex in a paraxial region thereof, the image-side surface of the fifth lens element is concave in a paraxial region thereof, and the image-side surface of the fifth lens element has at least one inflection point.