Nine-Lens Optical System for Compact High-Definition Imaging
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Solution Overview
Problem
Existing optical lenses struggle to simultaneously achieve high-definition imaging and a miniaturized, thin, and light design, making it difficult to meet the increasing demands for imaging quality while maintaining a compact form factor.
Innovation Solution
The optical lens is designed with a specific configuration of nine lenses, each with unique refractive powers and surface curvatures, which allows for a large field of view, improved imaging quality, and miniaturization by controlling the total optical length and effective focal length within specific relationships.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the optical lens is designed with a miniaturized and thin structure, then the volume and weight are reduced, but the imaging quality deteriorates
Solution Approach 1:
The optical lens is divided into nine individual lens elements with different refractive powers and surface curvatures. Each lens element is optimized to contribute specific optical functions, allowing the system to achieve high imaging quality while maintaining a compact overall structure. The segmentation enables complex optical corrections within a miniaturized form factor.
Solution Approach 2:
The patent employs precise control of multiple parameters including refractive indices, surface curvatures, lens thicknesses, and spacing between elements. By optimizing these parameters within specific ranges and relationships, the system achieves both miniaturization and high imaging quality. The total optical length and effective focal length are controlled within specific relationships to balance size and performance.
2Area of stationary object
If the field of view is expanded, then the imaging coverage is increased, but the optical aberrations increase
Solution Approach 1:
Different lens elements are designed with different local optical properties. Lenses with negative refractive power have specific surface curvature combinations to control aberrations in certain regions, while positive lenses compensate in other regions. This local optimization allows the system to achieve a large field of view while minimizing optical aberrations across the entire imaging area.
Solution Approach 2:
The patent introduces intermediate lens elements between the object-side lenses and the image-side lenses. These intermediate lenses act as mediators to correct optical aberrations introduced by the wide-angle configuration. Specifically, lenses with negative refractive power are positioned to compensate for aberrations from the positive refractive power lenses, enabling large field of view with controlled aberrations.
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 the optical lens to achieve excellent imaging quality with a large field of view while meeting the requirements of miniaturization, thereby addressing the challenges faced by existing optical lenses.
Implementation Method 1
The first lens has negative refractive power, the second lens has negative refractive power, the third lens has negative refractive power, the fourth lens has positive refractive power, the fifth lens has positive refractive power, the sixth lens has positive refractive power, the seventh lens has negative refractive power, the eighth lens has positive refractive power, and the ninth lens has negative refractive power
Data Source
AI summary
An optical lens, a camera module, and a terminal device are provided. The optical lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens. The first lens has negative refractive power, the second lens has negative refractive power, the third lens has negative refractive power, the fourth lens has positive refractive power, the fifth lens has positive refractive power, the sixth lens has positive refractive power, the seventh lens has negative refractive power, the eighth lens has positive refractive power. The optical lens satisfies the following relationship: 16.5<TTL/F<18, TTL is a distance from the object side surface of the first lens to the imaging plane of the optical lens along the optical axis, F is the effective focal length of the optical lens.