Lens Module Matching Structure for Coaxiality
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Solution Overview
Problem
Ensuring high coaxiality and stability in the bonding structure of lens modules is challenging due to eccentricity among optical lenses, which affects the optical performance of camera modules in electronic devices.
Innovation Solution
The lens module employs a bonding structure with a lens barrel and a lens group comprising multiple optical lenses, where each lens is aligned using a matching structure with specific slopes and planes on the peripheral portions to ensure axial alignment and reduce deformation during assembly, and shading elements to block stray light and enhance stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional bonding structures are used to connect optical lenses, then the manufacturing process is simple, but the coaxiality and stability among lenses cannot be ensured due to eccentricity
Solution Approach 1:
The bonding structure is segmented into multiple functional components: a bonding barrel with bonding holes for mechanical connection, bonding protrusions for positioning, and shading protrusions for light control. Each segment serves a specific function to collectively achieve high coaxiality and stability among optical lenses.
Solution Approach 2:
The bonding structure incorporates pre-designed bonding holes and bonding protrusions that are formed beforehand in the bonding barrel. This preliminary action ensures that when optical lenses are assembled, they automatically align with the pre-positioned bonding features, achieving high coaxiality without requiring complex real-time adjustment during assembly.
2Reliability
If optical lenses are connected with simple bonding, then the device complexity is low, but the stability and reliability of the lens module deteriorates
Solution Approach 1:
The bonding structure merges multiple functions into a single integrated component: mechanical bonding (through bonding holes and protrusions), positioning (through matching structures with slopes and planes), and stray light blocking (through shading protrusions). This merging achieves high reliability without proportionally increasing device complexity.
Solution Approach 2:
The bonding structure employs composite design combining different functional elements: structural bonding features for mechanical strength, matching structures with specific geometric profiles for precise positioning and deformation control, and shading elements for optical performance. This composite approach ensures both stability and reliability.
3Manufacturing precision
If matching structures with slopes and planes are added to align lenses, then the coaxiality improves, but the manufacturing complexity increases
Solution Approach 1:
The matching structures with slopes and planes are designed to enable self-alignment during assembly. The geometric features guide the optical lenses into correct axial positions automatically, allowing the assembly process to be self-correcting and reducing the need for complex external alignment tools or procedures.
4Object-affected harmful factors
If shading elements are added to block stray light, then the imaging quality improves, but the device complexity increases
Solution Approach 1:
The shading function is merged into the bonding structure itself through shading protrusions that extend from the bonding barrel. This integration eliminates the need for separate shading components, blocking stray light while minimizing additional device complexity.
Data Source
AI summary
A lens module includes a lens barrel and a lens group accommodated in the lens barrel. The lens group includes a first lens and a second lens, each of the first lens and the second lens including an arc part and a peripheral part around the arc part. A matching structure is formed by the peripheral part of the second lens and the peripheral part of the first lens. By virtue of the matching structure, the lens module of the present disclosure has a high concentricity.