Lens Module Concentricity via Segmented Holders
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Solution Overview
Problem
Achieving high concentricity between lens groups and their holders in lens modules for camera devices is challenging during the manufacturing process, leading to misalignment issues that affect image quality.
Innovation Solution
A lens module design featuring a lens barrel with integrated holders and a lens group configuration where each lens is aligned using concave and convex portions that engage to ensure coaxiality, reducing assembling tolerance and improving precision, thereby maintaining the central axis alignment with the optical axis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional lens group assembly is used, then manufacturing process is simple, but concentricity between lens groups and holder cannot be controlled
Solution Approach 1:
The holder is divided into a first holder and a second holder, with the lens group segmented into multiple lens units. Each lens unit is independently assembled with its own holder portion, allowing precise control of concentricity at each stage rather than attempting to control the entire assembly at once.
Solution Approach 2:
The first lens unit is pre-assembled with the first holder and second holder before being integrated with the remaining lens units. This preliminary assembly allows for precise alignment and concentricity control to be established early in the manufacturing process, ensuring high precision without complicating the overall assembly structure.
2Manufacturing precision
If high precision lens assembly is implemented, then concentricity is improved, but assembling tolerance increases
Solution Approach 1:
By segmenting the lens assembly into multiple independent units, each with its own holder portions, the patent reduces the cumulative tolerance accumulation that would occur in a single large assembly. Each segment can be manufactured and assembled with controlled tolerances independently.
Solution Approach 2:
The preliminary assembly of the first lens unit with the holders establishes precise concentricity early in the process. This preliminary action creates a stable foundation that reduces the impact of subsequent assembly tolerances, making the overall manufacturing process more manageable while maintaining high precision.
Data Source
AI summary
A lens module includes a lens barrel having a top wall that has a bottom surface, and a lens group received by the lens barrel. The lens group includes a first lens adjacent to the top wall and a second lens attached to the first lens. A first complementary configuration is arranged between the first lens and the top wall of the lens barrel for ensuring a concentricity between the lens group and the lens barrel, and a second complementary configuration is arranged between the first lens and the second lens for ensuring a concentricity between the first lens and the second lens.