Six-Element Camera Lens Design for Ultra-Thin Imaging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a need for ultra-thin, wide-angle camera lenses with good optical characteristics and fully corrected chromatic aberration for handheld devices, as existing miniature camera lenses struggle to achieve high imaging quality due to smaller pixel sizes and increasing demands for better performance.
Innovation Solution
A six-piece camera optical lens design is proposed, comprising lenses made of plastic with specific refractive powers and curvature radii, optimized to achieve a low total optical length, correct aberrations, and maintain miniaturization, with conditions such as −10.00≤f1/f3≤−1.00 and 3.00≤R5/R6≤20.00, ensuring better imaging quality and reduced sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a three-piece or four-piece lens structure is used, then the device complexity is reduced, but the imaging quality deteriorates due to smaller pixel sizes and increasing demands
Solution Approach 1:
The lens system is divided into six independent lens elements with specific refractive powers and curvature radii. Each lens element (first through sixth lenses) is designed with specific optical properties to correct different types of aberrations, allowing the system to achieve high imaging quality that cannot be obtained with fewer elements.
Solution Approach 2:
The patent employs lenses made of different materials with varying refractive indices and Abbe numbers. Specifically, the first lens has a positive refractive index, the second lens has a higher refractive index, and subsequent lenses use materials selected to correct chromatic and spherical aberrations, creating a composite optical system that optimizes imaging performance.
2Measurement precision
If more lens pieces are added to improve imaging quality, then the imaging quality improves, but the total optical length increases and miniaturization becomes difficult
Solution Approach 1:
The patent optimizes key parameters including the ratio of focal lengths (f1/f3 between -10.00 and -1.00), curvature radii ratios (R5/R6 between 3.00 and 20.00), and refractive indices of different lens elements. These parameter optimizations allow the six-element lens to achieve high imaging quality while maintaining a compact total optical length suitable for mobile devices.
Solution Approach 2:
The lens elements utilize aspherical surfaces with specific curvature radii to correct aberrations more efficiently than spherical surfaces. The object-side and image-side surfaces of each lens have optimized curvature radii (R1 through R12) that enable better light control and aberration correction within a shorter optical path length.
3Volume of moving object
If the pixel size of photosensitive devices is reduced, then the device dimensions are reduced, but the imaging quality deteriorates
Solution Approach 1:
The six-element lens structure provides sufficient degrees of freedom to correct various optical aberrations that become more pronounced with smaller pixel sizes. Each lens element addresses specific aberration types, ensuring that even with reduced pixel dimensions, the imaging quality remains high.
Solution Approach 2:
By using lens materials with different refractive indices and dispersion properties, the system corrects chromatic aberrations and other optical defects that would otherwise degrade image quality on smaller sensors. The material selection is optimized for the specific pixel size and sensor characteristics.
4Measurement precision
If chromatic aberration correction is improved, then the imaging quality improves, but the lens structure complexity increases
Solution Approach 1:
The patent specifically addresses chromatic aberration by using lens elements made of materials with different Abbe numbers and refractive indices. The second lens has a higher refractive index than the first, and subsequent lenses use materials selected to balance chromatic dispersion, achieving excellent chromatic aberration correction through material composition rather than complex mechanical structures.
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-performance, ultra-thin, and wide-angle lenses with fully corrected chromatic aberrations, maintaining miniaturization and improving image quality, as demonstrated by the specific design parameters and optical characteristics.
Implementation Method 1
A six-piece camera optical lens design is proposed, comprising lenses made of plastic with specific refractive powers and curvature radii
Data Source
AI summary
The present disclosure relates to the field of optical lenses and provides a camera optical lens. The camera optical lens includes, from an object side to an image side: a first lens; a second lens having a positive refractive power; a third lens having a negative refractive power; a fourth lens; a fifth lens; and a sixth lens. The camera optical lens satisfies following conditions: −10.00≤f1/f3≤−1.00; 3.00≤R5/R6≤20.00; and 100≤(R3+R4)/(R3−R4). The camera optical lens can achieve a high imaging performance while obtaining a low TTL.