Adjustable Optical Lens Alignment for Camera Module Image Quality
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Solution Overview
Problem
Conventional camera modules face challenges in ensuring high image quality due to deviations in the central axis alignment of optical lenses and sensors, which are exacerbated by limitations in molding and packaging techniques, leading to manufacturing inefficiencies and increased production costs.
Innovation Solution
An adjustable optical lens and camera module design featuring an optical structural member with adjustment channels allows for precise alignment of lenses and a diaphragm, enabling adjustments in position, orientation, and alignment to coincide central axis lines, thereby improving image quality and reducing manufacturing complexities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional molding and packaging techniques are used to assemble multiple lenses, then the manufacturing process is simple, but the central axis alignment precision deteriorates due to deviations among lenses and between lens and sensor
Solution Approach 1:
The optical system is segmented into multiple independent lenses that can be separately adjusted within the optical structural member. Each lens can be positioned and oriented independently to achieve precise central axis alignment, resolving the alignment precision issue while maintaining manageable complexity through modular design
Solution Approach 2:
The optical structural member incorporates adjustable mechanisms that allow dynamic positioning of lenses during assembly and manufacturing. This enables precise alignment adjustment of lens central axes relative to each other and to the sensor, transforming a static assembly problem into a dynamically adjustable solution
2Manufacturing precision
If gluing or welding processes are used to arrange lenses on the optical lens case, then the lenses are fixed in position, but the position and inclination accuracy deteriorates due to material interference
Solution Approach 1:
The optical structural member is designed with pre-configured positioning features and adjustment mechanisms that establish precise lens positions and inclinations before final fixation. This preliminary positioning action ensures accuracy is achieved through mechanical design rather than relying solely on gluing or welding processes
Solution Approach 2:
The optical structural member acts as an intermediary structure between the lens case and the lenses themselves, providing a precision adjustment interface that mediates the connection. This intermediary structure enables accurate positioning while separating the adjustment function from the fixation function, reducing the impact of gluing or welding materials on alignment accuracy
3Reliability
If deviation between optical lens central axis and sensor central axis occurs during packaging, then image quality deteriorates, but ensuring perfect alignment increases manufacturing difficulty
Solution Approach 1:
The optical structural member incorporates alignment adjustment mechanisms that enable feedback-based correction of central axis deviations between the optical lens and sensor. During assembly, alignment can be checked and adjusted iteratively to ensure the central axes coincide, guaranteeing image quality while managing complexity through systematic adjustment procedures
Solution Approach 2:
The design allows for parameter changes in lens position and orientation within the optical structural member to compensate for alignment deviations. By adjusting positional parameters and angular parameters of the lens assembly, the central axis alignment can be optimized to ensure image quality without requiring fundamentally complex manufacturing processes
4Volume of moving object
If multiple lenses are aligned overlappingly and molded together, then the optical lens structure is compact, but the central axis line deviation increases due to packaging limitations
Solution Approach 1:
Multiple lenses are nested within the optical structural member in an overlapping arrangement that maintains compact volume. The nested structure allows each lens to be positioned within the overall optical path while maintaining space efficiency, achieving compact optical lens design without sacrificing central axis alignment through the adjustable architecture
Data Source
AI summary
An adjustable optical lens and camera module and manufacturing method thereof are provided, wherein the camera module includes an optical sensor and an adjustable optical lens. The adjustable optical lens, which is arranged in a photosensitive path of the optical sensor, includes an optical structural member and at least two lenses. Each of the lens is arranged in an internal space of the optical structural member along an axial direction of the optical structural member, wherein before packaging the adjustable optical lens and the optical sensor, at least one position of the lens in the internal space of the optical structural member is able to be adjusted, so that a central axis line of the adjustable optical lens and a central axis line of the optical sensor are coincided, so as to improve the image quality of the camera module.