Six-Lens Imaging Assembly for Flat Near-Range Focal Planes
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Solution Overview
Problem
Existing optical imaging systems in mobile devices suffer from significant curvature of the imaging plane when capturing nearby or ultra-short-range objects due to their design based on long-range object imaging, leading to imaging challenges.
Innovation Solution
An optical imaging system with a specific lens configuration and gap maintaining members featuring projections intersecting the optical axis, including lenses with varying refractive powers and shapes, and a filter to correct aberrations, ensuring optimal imaging performance for both long and short-range objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the optical imaging system is designed based on long-range object imaging, then the imaging performance for long-range objects is optimized, but significant curvature of the imaging plane occurs when short-range objects are imaged
Solution Approach 1:
The optical imaging system employs a movable lens assembly that can shift along the optical axis to different positions. By dynamically adjusting the lens position based on the object distance, the system maintains optimal imaging performance for both long-range and short-range objects, preventing imaging plane curvature when capturing nearby objects
Solution Approach 2:
The system changes the optical parameters by adjusting the relative positions of multiple lenses with different refractive powers. By varying the lens configuration and spacing, the system adapts to different object distances, maintaining a flat imaging plane across various ranging scenarios
2Adaptability or versatility
If a camera module includes both optical imaging systems for long-range and short-range objects, then imaging capability for various distances is improved, but the device complexity increases
Solution Approach 1:
The optical imaging system uses a single multi-element lens assembly that can perform both long-range and short-range imaging functions. By making the lens assembly movable and adjustable, one system achieves the versatility of multiple dedicated systems without the corresponding increase in complexity
Solution Approach 2:
The patent combines multiple lenses with different refractive powers into a single integrated optical system. By merging these elements and enabling their collective movement, the system achieves multi-distance imaging capability while maintaining a compact and unified structure rather than using separate camera modules
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 system effectively prevents curvature of the imaging plane, improving imaging quality and reducing aberrations for both long and short-range objects, enhancing overall optical performance.
Implementation Method 1
a gap maintaining member disposed between one or more pairs of adjacent lenses and including a projection protruding from an internal circumferential surface in a direction intersecting an optical axis
Data Source
AI summary
An optical imaging system includes a first lens, a second, a third lens, a fourth lens, a fifth lens, a sixth lens, the first lens to the sixth lens being disposed in order from an object side, and a gap maintaining member disposed between one or more pairs of adjacent lenses and including a projection protruding from an internal circumferential surface in a direction intersecting an optical axis.