Ultra-Wide Optical Lens Layout for Aberration and Sensor Size
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Intelligent electronic devices face challenges in simultaneously meeting the requirements for equivalent focal length and photosensitive element size in ultra wide lens configurations, which affect image quality and angle of view.
Innovation Solution
An optical lens design with specific surface configurations and refractive indices for each lens element, including a seventh lens with dual bending portions, along with a light filter and photosensitive element, to optimize focal length and element size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a plastic optical lens is used instead of a glass optical lens, then the weight is reduced and assembly is easier, but molding defects such as sink marks and bubbles occur more frequently
Solution Approach 1:
The patent changes the material parameters by selecting specific resin materials with appropriate viscosity and shrinkage characteristics. It also changes geometric parameters by optimizing the thickness distribution and curvature radii of the lens surfaces to prevent sink marks and bubbles during molding while maintaining the weight advantage of plastic over glass
Solution Approach 2:
The patent employs composite material approaches by combining plastic optical lens material with metal mounting structures that have different thermal expansion coefficients. This composite structure allows the plastic lens to be molded with reduced defects while the metal components provide structural stability and precise positioning
2Measurement precision
If the curvature radius of the optical lens is increased to reduce spherical aberration, then the aberration is reduced, but the lens size increases
Solution Approach 1:
The patent divides the optical system into multiple components including the optical lens, aspherical lens, and cover glass. By segmenting the optical functions across multiple elements with different curvature radii, it achieves aberration correction without requiring any single lens to have an excessively large size
Solution Approach 2:
The patent applies different curvature radii to different regions of the optical system. The optical lens has a first curvature radius, the aspherical lens has a second curvature radius, and the cover glass has a third curvature radius. This local variation in curvature allows each component to contribute to aberration reduction while maintaining compact overall dimensions
3Volume of moving object
If the thickness of the optical lens is reduced to achieve a compact design, then the device size is reduced, but the lens strength and optical performance deteriorate
Solution Approach 1:
The patent employs aspherical lens surfaces with specifically designed curvature profiles. The aspherical lens has a surface that deviates from a simple spherical shape, allowing light rays to be focused more effectively. This curved surface design enables the lens to maintain adequate strength and optical performance even with reduced thickness, achieving compact device size without sacrificing lens integrity
4Ease of manufacture
If conventional molding techniques are used for the optical lens, then the manufacturing process is simple, but molding defects such as sink marks and bubbles occur
Solution Approach 1:
The patent incorporates preliminary design considerations into the molding process by pre-calculating and compensating for potential defects. The lens thickness distribution and material selection are optimized in advance to prevent sink marks and bubble formation during injection molding, allowing conventional molding techniques to produce high-quality parts without requiring complex post-processing
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 design achieves high image quality and large angle of view by satisfying both focal length and photosensitive element size requirements, reducing costs through refractive index management and controlling aberrations.
Implementation Method 1
a first aspherical lens having a first curvature radius
Implementation Method 2
a second aspherical lens having a second curvature radius
Data Source
Figure 1
Figure 2
Figure 3
AI summary
This application discloses an optical lens, an optical module, and an electronic device. The optical lens of this application sequentially includes, from an object side to an image side along an optical axis: a first lens with a negative bending force, where an object side surface of the first lens is convex, and an image side surface of the first lens is concave; a second lens with a positive bending force, where an object side surface of the second lens is convex, and an image side surface of the second lens is concave; a third lens with a positive bending force, where an object side surface of the third lens is convex, and an image side surface of the third lens is concave; a fourth lens with a positive bending force and biconvex surfaces; a fifth lens with a negative bending force and biconcave surfaces; a sixth lens with a positive bending force, where an object side surface of the sixth lens is concave, and an image side surface of the sixth lens is convex; and a seventh lens with a negative bending force, where an object side surface of the seventh lens includes a first bending portion and a second bending portion which are connected to form a convex surface, and an image side surface of the seventh lens includes a third bending portion and a fourth bending portion which are connected to form a concave surface.