Multi-Lens Optical System for Compact Mobile Imaging
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Solution Overview
Problem
Current optical lenses for mobile devices face challenges in achieving miniaturization while maintaining high image quality and wide viewing angles, necessitating a compact design that improves optical image quality.
Innovation Solution
The optical lens configuration includes a series of lenses with specific refractive powers and diameters, such as negative and positive refractive power lenses, arranged to satisfy certain diameter and curvature radius conditions, allowing for a wide viewing angle and short total length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the optical lens uses multiple lenses to improve image quality, then the image quality is improved, but the total length and thickness of the optical lens increases
Solution Approach 1:
The patent applies nesting by placing the second lens inside the first lens, the third lens inside the second lens, and so on through the seventh lens. Each lens is positioned within the optical path of the previous lens, creating a compact nested structure that reduces the overall total length while maintaining multiple lens elements for high image quality
Solution Approach 2:
The patent transitions from a traditional linear arrangement of lenses to a three-dimensional nested configuration. By utilizing radial and axial positioning within the nested structure, the design achieves compactness in the longitudinal dimension while maintaining optical performance through strategic placement of multiple lens elements in different spatial dimensions
2Length of moving object
If the optical lens is miniaturized to reduce thickness, then the thickness is decreased, but the viewing angle and image quality deteriorate
Solution Approach 1:
The nested lens configuration allows multiple lens elements with different optical functions to be packed into a compact thickness while maintaining their individual contributions to the viewing angle. The alternating positive and negative refractive power lenses in the nested structure enable wide-angle performance without increasing overall thickness
Solution Approach 2:
The patent utilizes parameter changes by specifying precise curvature radius ratios (D2/R2 between 0.65-1.2) and effective diameter ratios (Φ2/Φ1 between 0.2-0.65) for the nested lenses. These controlled parameter variations optimize the optical path and light gathering capability within the compact thickness, achieving wide viewing angle performance
3Manufacturing precision
If the optical lens uses multiple lenses to improve image quality, then the image quality is improved, but the device complexity increases
Solution Approach 1:
The nested structure integrates multiple lens elements into a unified compact assembly, reducing the number of separate components and mounting interfaces required. This nested configuration simplifies the overall device structure while maintaining the multi-lens optical system needed for high image quality
Solution Approach 2:
The patent merges multiple lens elements into a single nested optical assembly where lenses are positioned concentrically. This combining approach reduces structural complexity by eliminating the need for separate housings and alignment mechanisms for each lens, while preserving the complex optical functions of multiple elements
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 both wide viewing angles and a short total length, enhancing image quality and compactness for mobile device applications.
Implementation Method 1
The first lens and the second lens have negative refractive power. The third lens and the seventh lens have positive refractive power.
Data Source
AI summary
An optical lens, in order from an object side to an image-forming side, includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens. The object-side surface of the first lens has an effective diameter Φ1. The image-side surface of the first lens has a curvature radius R2 and an effective radius D2. The object-side surface of the second lens has an effective diameter Φ2. The optical lens satisfies at least one of the following conditions: 0.2≤Φ2/Φ1, Φ2/Φ1≤0.65, 0.65≤D2/R2 and D2/R2≤1.2.