Optical Image Capturing Module Multi-Lens Frame Alignment
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Solution Overview
Problem
Video-recording devices with multiple lenses face challenges in achieving accurate image quality due to difficulties in calibrating the optical axis with CMOS active pixel sensors during assembly, and managing the complex composition of components, especially when requiring multiple lenses for higher photographic standards.
Innovation Solution
An optical image capturing module with a circuit assembly and lens assembly, featuring a multi-lens frame, fixed-focus and auto-focus lens assemblies, and a driving assembly, where the optical axis of each lens assembly overlaps the central normal line of the image sensor's sensing surface, ensuring light passes through the appropriate channels for improved image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple lenses are used to meet higher photographic requirements, then imaging capability is improved, but optical axis alignment precision with CMOS sensor deteriorates
Solution Approach 1:
The patent divides the optical system into multiple independent lens assemblies (first lens assembly, second lens assembly, third lens assembly, fourth lens assembly), each with its own optical axis that can be independently aligned to the CMOS sensor. This segmentation allows each lens assembly to be optimized and calibrated separately, resolving the alignment precision problem while maintaining multiple imaging functions.
2Adaptability or versatility
If more lenses are added to the system, then photographic requirements are met, but device complexity increases
Solution Approach 1:
The patent merges multiple lens assemblies with different functions (fixed-focus and auto-focus capabilities across wide-angle, normal, and telephoto ranges) into a single integrated optical module. This consolidation achieves diverse photographic requirements while managing complexity through unified design and shared components such as the common CMOS sensor and integrated housing structure.
3Manufacturing precision
If multiple lens assemblies are used, then imaging quality is improved, but assembly and packaging quality management becomes difficult
Solution Approach 1:
The patent implements preliminary alignment and calibration actions during the manufacturing process, where each lens assembly's optical axis is pre-aligned to correspond with the CMOS sensor before final assembly. This preliminary action ensures that imaging quality is maintained while simplifying the overall assembly process, as the critical alignment work is performed in advance rather than during final packaging.
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 solution ensures precise alignment and operation of multiple lenses, enhancing image quality and simplifying the assembly process by allowing light to be effectively directed to the image sensor, addressing the challenges of complex composition and multiple lens requirements.
Implementation Method 1
Each fixed-focus lens assembly has at least two lenses with refractive power... Each auto-focus lens assembly has at least two lenses with refractive power
Data Source
AI summary
An optical imaging module, including a circuit assembly and a lens assembly, is provided. The circuit assembly includes a base, a circuit substrate, image sensor elements, conductors, and a multi-lens frame. The image sensor elements are disposed in the accommodation space of the base. The conductors are disposed between circuit contacts of the circuit substrate and image contacts of the image sensor elements. The multi-lens frame can be integrally formed and covered on the circuit substrate and the image sensor elements. The lens assembly includes a lens base, a fixed lens assembly, an auto lens assembly, and a drive assembly. The lens base is disposed on the multi-lens frame. Each of the auto lens assembly and the fixed lens assembly has lenses having refractive power. The driving assembly drives the auto lens assembly to move in the direction of the normal line of the sensing surface.