Six-Lens Camera Optics With Gap Projections for Flat Near Imaging
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Solution Overview
Problem
Mobile camera modules experience significant curvature of the imaging plane when imaging short-range objects due to their optical systems being designed for long-range objects, leading to imaging challenges.
Innovation Solution
An optical imaging system with a specific lens configuration and gap maintaining members featuring projections on internal circumferential surfaces to maintain lens gaps and control aberrations, including lenses with varying refractive powers and shapes, and projections to prevent curvature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an optical imaging system is designed for long-range object imaging, then the imaging performance for long-range objects is improved, but significant curvature of the imaging plane occurs when short-range objects are imaged
Solution Approach 1:
The patent introduces a movable lens unit that can shift along the optical axis and laterally. This dynamic adjustment capability allows the optical system to adapt its configuration for different object distances, enabling both long-range and short-range imaging without significant imaging plane curvature by optimizing lens positions based on the imaging distance
Solution Approach 2:
The patent employs multiple lenses with different refractive powers (positive and negative) and varying focal lengths. By changing the optical parameters such as focal length, refractive index, and lens spacing, the system can compensate for imaging plane curvature when imaging short-range objects while maintaining long-range imaging performance
2Reliability
If the optical system structure is optimized for long-range imaging, then long-range imaging quality is improved, but the system becomes less adaptable for short-range object imaging
Solution Approach 1:
The patent designs an optical imaging system that serves multiple functions: it can effectively image both long-range and short-range objects. The combination of fixed and movable lens units, along with the specific arrangement of lenses having different refractive powers, enables the system to maintain high imaging quality across varying object distances, achieving multi-functionality
Solution Approach 2:
The movable lens unit that can be positioned at different locations along the optical axis provides dynamic adaptability. This allows the system to adjust its optical configuration based on the object distance, making it versatile for both long-range and short-range imaging applications while maintaining reliable imaging quality
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 significant curvature of the imaging plane when imaging nearby objects, improving imaging quality and reducing aberrations.
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
Implementation Method 2
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
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.