Multi-Lens Frame Optical Module with Auto-Focus Alignment
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Solution Overview
Problem
Current optical image capturing modules with multiple lenses face challenges in achieving accurate calibration of the optical axis with CMOS active pixel sensors, leading to compromised image quality, particularly when trying to incorporate multiple lenses while maintaining fine imaging standards.
Innovation Solution
The optical image capturing module includes a circuit assembly with image sensor elements, electric conductors, and a multi-lens frame, where auto-focus lens assemblies are designed to have their optical axes overlap with the central normal line of the sensing surface, ensuring light passes through the lens assemblies and is accurately focused on the image sensor, using lens bases with accommodating holes connected to light channels and driven by voice coil motors to adjust focus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple lenses are incorporated to meet higher photographic requirements, then the photographic capability is improved, but the optical axis calibration accuracy deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-aligning the optical axis of each lens assembly with the central normal line of the corresponding image sensor element during the module assembly process. This pre-alignment ensures that when multiple lenses are incorporated, their optical axes are already calibrated to the correct positions, eliminating the need for complex post-assembly calibration and maintaining high optical axis calibration accuracy despite the increased photographic capability from multiple lenses.
2Adaptability or versatility
If multiple lenses are incorporated to meet higher photographic requirements, then the photographic capability is improved, but the image quality deteriorates
Solution Approach 1:
The patent ensures image quality is maintained when multiple lenses are incorporated by pre-positioning each lens assembly such that its optical axis overlaps with the central normal line of the corresponding image sensor element. This preliminary positioning action during assembly ensures that light from multiple lenses is accurately focused on their respective sensors, preventing image quality deterioration that would otherwise result from misalignment in multi-lens configurations.
3Manufacturing precision
If the optical axis of each auto-focus lens assembly overlaps the central normal line of the sensing surface, then the image quality is improved, but the alignment complexity increases
Solution Approach 1:
The patent introduces the multi-lens frame as an intermediary component that integrates multiple lens assemblies and image sensor elements. The frame provides a unified reference structure with light channels that guide the optical axes of all lens assemblies to overlap with the central normal lines of their corresponding sensors. This intermediary structure simplifies the alignment process by providing a common reference framework, reducing the overall alignment complexity despite the requirement for precise optical axis overlap across multiple lenses.
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 ensures high image quality by accurately focusing light on the image sensor, preventing deformation during encapsulation and reducing module size, while allowing for the use of multiple lenses without compromising image quality.
Implementation Method 1
the driving assembly is electrically connected to the first circuit substrate and drives the auto-focus lens assembly to move in a direction of the central normal line of the sensing surface of the image sensor element connected to the first circuit substrate
Implementation Method 2
Each of the at least two auto-focus lens assemblies has at least two lenses with refractive power
Data Source
AI summary
An optical imaging module utilizes electric conductors to reduce the overall thickness of an image sensor element. With the configuration of an auto lens assembly and a multi-lens frame, incident light passes through the auto lens assembly and is accurately focused on the image sensor element. Hereby, the image sensor element is thus fully imaged. Besides, the invention can ensure the image quality and prevent the element from deforming during encapsulation and causing the problems such as short circuit, and can reduce the size of the optical image capturing module.