Six-Lens Optical Imaging System for Wide-Angle Miniaturization
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Solution Overview
Problem
The challenge is to design a wide-angle camera lens for portable electronic devices that balances miniaturization, high imaging quality, and a wide field of view, while overcoming the limitations of reduced lens length and increased pixel density in modern camera systems.
Innovation Solution
The optical imaging system comprises six lenses with specific focal powers and surface curvatures, carefully arranged to achieve a maximum half field of view between 50° and 60°, and optimized curvature radii and thicknesses to ensure ultra-thinness, miniaturization, and high imaging quality, using aspherical surfaces to correct aberrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the total length of the camera lens is reduced to accommodate miniaturization of portable electronic products, then the device size is reduced, but the imaging quality and field of view are compromised
Solution Approach 1:
The camera lens is divided into six separate lens elements (first through sixth lenses) with different focal powers and surface curvatures. Each lens element contributes differently to the overall optical function, allowing the system to achieve wide field of view and high imaging quality while maintaining a compact total length. The segmentation enables independent optimization of each element's parameters.
Solution Approach 2:
The patent employs aspherical surfaces on multiple lens elements, where the curvature radius varies according to specific conditional expressions. This curvature optimization allows for better aberration correction and improved imaging quality in a compact design. The aspherical surfaces enable more precise control of light paths within the limited lens length.
2Adaptability or versatility
If the field of view is widened to capture more information, then the photographing performance is improved, but the lens length and complexity increase
Solution Approach 1:
Different lens elements are assigned different focal powers (positive and negative) and surface curvature characteristics tailored to their specific positions in the optical path. The first lens has a convex object side surface, while the sixth lens has a concave object side surface, and intermediate lenses have varying combinations. This localized optimization of optical properties enables wide field of view without requiring excessive overall complexity.
Solution Approach 2:
The patent optimizes multiple parameters including curvature radii (R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11), thicknesses (CT1, CT2, CT3, CT4, CT5, CT6), and axial distances (SAG32) according to specific conditional expressions. These parameter changes enable the system to achieve a maximum half field of view of 50° or more while controlling the total lens length and maintaining manageable complexity.
3Measurement precision
If the pixel density is increased to improve image resolution, then the imaging quality is enhanced, but the requirements for lens precision and miniaturization become more stringent
Solution Approach 1:
The six-lens configuration is designed to simultaneously achieve multiple functions: wide field of view, high imaging quality suitable for high pixel density sensors, and compact form factor. Each lens element serves multiple purposes in correcting different types of aberrations while contributing to the overall focal length and field of view characteristics.
Solution Approach 2:
The patent replaces complex mechanical adjustments with precisely controlled aspherical surface geometries and fixed lens element positions. The optical design achieves high precision imaging through the mathematical definition of aspherical surfaces rather than through adjustable mechanical components, enabling miniaturization while maintaining image quality for high pixel density applications.
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 enables a wider field of view, reduced volume, and improved imaging quality, addressing the constraints of miniaturization and high pixel density, while maintaining a relatively short focal length and increased depth of field.
Implementation Method 1
the optical imaging system includes, sequentially from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens
Data Source
AI summary
The disclosure discloses an optical imaging system. The optical imaging system includes, sequentially from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens has a focal power, and an object side surface thereof is a convex surface; the second lens has a focal power; the third lens has a focal power, and an image side surface thereof is a convex surface; the fourth lens has a focal power, an object side surface thereof is a convex surface, and an image side surface thereof is a concave surface; the fifth lens has a positive focal power, and an object side surface thereof is a convex surface; and the sixth lens has a negative focal power, and an object side surface thereof is a concave face.