Split Lens Assembly With Calibration Spacing for Camera Modules
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Solution Overview
Problem
Conventional lens assemblies in camera modules suffer from high production costs, low yield, and assembly difficulties due to tight tolerances and contact between lenses, leading to issues like image quality degradation and increased production costs.
Innovation Solution
A split lens assembly comprising two lens modules with a spacing between them, using a connecting medium and spacers to ensure stable positioning and optical stability, allowing for automatic calibration and improved image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If lenses are mounted in contact with each other in a conventional lens assembly, then the structure is compact, but the assembly precision and image quality deteriorate due to tolerance accumulation and pressing deformation
Solution Approach 1:
The lens assembly is divided into multiple lens modules, with each module containing one or more lenses. This segmentation allows each module to be assembled and calibrated independently, preventing tolerance accumulation across the entire assembly. The spacing between modules isolates deformation effects, ensuring that pressing forces on individual lenses do not propagate to other lenses, thereby maintaining manufacturing precision while achieving compact overall structure.
2Manufacturing precision
If tight tolerances are controlled in conventional lens assemblies, then image quality is maintained, but production costs increase and yield decreases
Solution Approach 1:
Each lens module is pre-assembled and pre-calibrated as a complete functional unit before being integrated into the final lens assembly. This preliminary action ensures that critical alignment and focus adjustments are made when the system is simpler and more accessible, reducing the need for tight tolerances during final assembly. The modular approach allows independent calibration of each module, significantly improving production yield while maintaining image quality.
3Object-affected harmful factors
If lenses are pressed against spacer rings to block non-light-transmissive portions, then light leakage is prevented, but lens deformation and image quality degradation occur
Solution Approach 1:
A dedicated light-shielding component is introduced as an intermediary element between the lenses and spacer rings. This component specifically blocks non-light-transmissive portions of lenses without requiring the lenses themselves to be pressed against rigid structures. By separating the light-shielding function from the mechanical support function, the lens surfaces remain free from deformation-causing pressures, preserving optical quality while effectively preventing light leakage.
4Manufacturing precision
If rotation adjustment is performed for eccentric compensation during assembly, then alignment precision is improved, but assembly complexity and time increase
Solution Approach 1:
Eccentric compensation and alignment adjustments are performed during the preliminary assembly stage of each lens module, rather than during final integration. Each module is pre-calibrated with proper lens rotation and positioning while individual components are still accessible. This preliminary action simplifies the final assembly process, reducing overall complexity while maintaining high alignment precision through controlled rotational adjustments.
Data Source
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AI summary
Disclosed are a split lens assembly (10) and a camera module. The split lens assembly comprises a first lens module (11) and a second lens module (12). The first lens module is assembled to the second lens module. The first lens module and the second lens module are calibrated and assembled. A spacing (20) that facilitates calibration is located between the first lens module and the second lens module.