Six-Lens Wide-Angle Module for High-Resolution Manufacturability
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Solution Overview
Problem
Conventional ultra-wide-angle lens modules with high image resolution face manufacturing challenges due to large optical apertures, sensitivity issues, and high production costs, limiting their availability beyond 50 M pixels.
Innovation Solution
An optical lens assembly with a specific configuration of six lenses, each with defined refractive powers and surface curvatures, optimized focal lengths, and central thicknesses, along with a stop and image sensor, to achieve a wide-angle feature with high image resolution and improved illuminance, while correcting aberrations and chromatic aberration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a large optical aperture is used to achieve high image resolution and wide angle, then the field of view and image resolution are improved, but manufacturing sensitivity and production cost increase
Solution Approach 1:
The optical system is divided into six separate lens elements with different refractive powers (positive and negative) arranged in a specific sequence. Each lens is designed with specific curvature parameters to collectively achieve the desired wide-angle field of view while controlling optical aberrations, thereby reducing manufacturing sensitivity compared to a single large-aperture lens.
Solution Approach 2:
The patent employs specific parameter ranges for lens curvatures, focal lengths, and thicknesses to optimize the optical system. By carefully controlling parameters such as the curvature radius ratios and focal length combinations, the system achieves high image resolution and wide field of view while maintaining manufacturability and reducing sensitivity to manufacturing variations.
2Measurement precision
If a large optical aperture is used to achieve high image resolution, then the image resolution is improved, but production cost increases
Solution Approach 1:
Instead of using a single large-aperture lens that would be expensive to manufacture, the system segments the optical function across six smaller lens elements. This approach reduces the cost of individual lens components and assembly while achieving the same or better image resolution through optimized optical path design.
Solution Approach 2:
The patent optimizes production cost by selecting appropriate material indices and curvature parameters for each lens element. The specific parameter combinations allow for the use of standard optical materials and manufacturing processes, reducing overall production cost while maintaining high image resolution performance.
3Adaptability or versatility
If a large optical aperture is used to achieve wide angle and high resolution, then the field of view is improved, but mass production becomes difficult
Solution Approach 1:
The optical system is segmented into multiple standardized lens elements that can be manufactured independently using conventional mass production techniques. The modular design with defined interfaces and mounting structures facilitates automated assembly and quality control, enabling mass production of ultra-wide-angle lens modules with large fields of view.
Solution Approach 2:
The patent establishes specific parameter ranges for lens curvatures, focal lengths, and tolerances that are optimized for mass production. These parameter specifications allow for standardized manufacturing processes and quality control, improving productivity while maintaining the desired wide field of view and optical 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 optical lens assembly achieves a large optical aperture with high image resolution up to 50 M pixels, enhancing the field of view and maintaining illuminance, while optimizing lens space and correcting optical distortions.
Implementation Method 1
a first lens with negative refractive power, comprising an object-side surface and an image-side surface
Data Source
AI summary
An optical lens assembly includes, in order from an object-side to an image-side: a first lens, a stop, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, wherein half of a maximum field of view of the optical lens assembly is HFOV, an f-number of the optical lens assembly is Fno, a distance from an object-side surface of the first lens to an image plane along an optical axis is TL, a maximum image height of the optical lens assembly is IMH, a focal length of the optical lens assembly is f, a focal length of the first lens is f1, and the following conditions are satisfied: 0.73<HFOV/(INM*Fno*TL)<1.67, and −0.58<f/f1<−0.30.