Camera Lens Assembly with Aspheric Lenses for Wide-Angle Miniaturization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a need for a camera lens assembly that offers a wide-angle view with high resolution, suitable for selfies, while being compact enough for mobile devices, as existing lenses struggle to balance field of view and image quality within the limited space.
Innovation Solution
The camera lens assembly consists of multiple lenses with aspheric surfaces, carefully arranged to optimize focal powers and surface forms, ensuring a large field of view and miniaturization, with specific axial distances and radii of curvature that correct aberrations and distortions, including a configuration of six lenses with negative and positive focal powers and concave/convex surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the field of view is increased to provide wide-angle view, then the viewing angle is improved, but the lens assembly length increases which conflicts with miniaturization requirements
Solution Approach 1:
The lens assembly is divided into six individual lenses with different focal powers (negative, positive, negative, positive, positive, negative) arranged in sequence. Each lens segment contributes specific optical functions to achieve wide field of view while maintaining compact overall length through optimized segmentation of optical functions.
Solution Approach 2:
The patent utilizes aspheric surfaces with specific radii of curvature (e.g., first lens object side surface radius of curvature R1, image side surface radius of curvature R2) to optimize optical paths in multiple dimensions. The aspheric coefficients and surface curvatures are carefully designed to bend light rays more efficiently, achieving wide-angle view without increasing the axial length of the lens assembly.
2Measurement precision
If the aperture is increased to improve image quality and resolution, then the image information quantity is improved, but the lens assembly becomes more complex and larger
Solution Approach 1:
Each lens in the assembly has specifically designed local optical properties with different focal powers and surface curvatures. The first lens has negative focal power with specific aspheric coefficients, while subsequent lenses have varying positive and negative focal powers. This local optimization of optical quality at each lens element enables high image resolution without requiring a uniformly complex entire assembly.
Solution Approach 2:
The patent optimizes specific parameters including the axial distances between lenses (e.g., distance from first lens to second lens, distance from third lens to fourth lens) and the radii of curvature of aspheric surfaces. By carefully adjusting these parameters, the system achieves high image quality and resolution while controlling the overall complexity and size of the lens assembly.
3Measurement precision
If aspheric surfaces with specific radii of curvature are used to correct aberrations, then image quality is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent employs aspheric surfaces with specific radii of curvature (R1, R2, R3, R4, R5, R6 for object side and image side surfaces respectively) to correct optical aberrations. The aspheric coefficients are designed to minimize spherical and chromatic aberrations while maintaining manufacturability. The curvature values are optimized to balance image quality improvement with practical manufacturing capabilities.
4Adaptability or versatility
If multiple lenses with different focal powers are arranged in sequence, then the field of view and image quality are improved, but the lens assembly length increases
Solution Approach 1:
The six lenses are arranged in a compact nested sequence along the optical axis, with each lens positioned close to the previous one. The axial distances between adjacent lenses are minimized while maintaining proper optical spacing. This nested arrangement allows multiple lenses with different focal powers to work together for wide-angle view without significantly increasing the overall length of the optical system.
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 effectively increases the viewing angle, ensures miniaturization, and improves image quality by correcting spherical and chromatic aberrations, making it suitable for portable electronic devices.
Implementation Method 1
a first lens having a negative focal power, wherein an object side surface of the first lens is a concave surface; a second lens having a focal power, wherein an image side surface of the second lens is a concave surface
Data Source
AI summary
A camera lens assembly is provided. The camera lens assembly, comprises sequentially, from an object side to an image side along an optical axis, a first lens, multiple subsequent lenses, and a photosensitive element arranged on an image plane, wherein the first lens has a negative focal power and an object side surface of the first lens is a concave surface; and an axial distance from the object side surface of the first lens to the image plane TTL and ImgH, ImgH being half a diagonal length of an effective pixel area of the photosensitive element, satisfy: 1.5<TTL/ImgH<1.7.