Optical Lens Assembly With Notched Annular Bonding for Compact Imaging
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Solution Overview
Problem
Existing camera modules face challenges in achieving high pixels, small size, and large aperture due to cumulative production errors and assembly difficulties, leading to low process capability index and high defect rates, while current assembly methods struggle to reduce size and ensure imaging quality and reliability.
Innovation Solution
An optical lens assembly method involving active calibration to adjust and determine the relative position of lens components, followed by bonding with a connecting medium to fix them, allowing for reduced size and improved imaging quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the number of lens sheets is increased to achieve high pixels and large aperture, then the imaging quality is improved, but the cumulative production errors increase and the manufacturing precision deteriorates
Solution Approach 1:
The optical lens is divided into multiple lens sheets (first lens sheet, second lens sheet, third lens sheet) with different functions. Each lens sheet is manufactured and assembled separately with controlled tolerances, then combined to achieve the overall high imaging quality required for high pixels and large aperture without cumulative errors affecting the entire system.
Solution Approach 2:
Different lens sheets are designed with specific local optical properties and tolerance requirements. The first lens sheet has first tolerance parameters, the second lens sheet has second tolerance parameters, and the third lens sheet has third tolerance parameters, allowing each component to be optimized for its specific function while controlling local errors.
2Manufacturing precision
If strict tolerances are applied to reduce production errors, then the imaging quality is improved, but the assembly difficulty increases and the process capability index decreases
Solution Approach 1:
The assembly process is segmented into multiple stages with intermediate inspections. Each lens sheet is assembled and inspected separately before final assembly, allowing for error correction at each stage and reducing the overall assembly difficulty compared to a single-stage process with extremely tight tolerances.
Solution Approach 2:
The patent specifies preliminary actions including pre-assembling lens sheets in a first assembly state, inspecting them, and then proceeding to the final assembly state. This preliminary assembly and inspection allows for error detection and correction before final assembly, improving the process capability index.
3Volume of moving object
If the lens size is reduced to meet compact design requirements, then the device size is decreased, but the assembly accuracy becomes more difficult to control
Solution Approach 1:
The compact lens is segmented into multiple thin lens sheets that can be precisely assembled in sequence. Each lens sheet contributes a small portion to the overall compact size, and their individual positions can be controlled with high precision during assembly to maintain accuracy despite the reduced overall dimensions.
Solution Approach 2:
The patent applies different tolerance parameters to different lens sheets based on their specific positions and functions within the compact structure. By adjusting tolerance parameters dynamically according to each component's criticality and position, the system achieves high assembly accuracy within a compact size reduction.
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
The method enhances the process capability index, reduces production costs, and improves image quality by minimizing size and ensuring structural strength and reliability of the optical lens.
Implementation Method 1
a connecting medium adapted to fix the first lens component and the second lens component together
Data Source
AI summary
An optical lens is provided, including a first lens component, a second lens component, and a first glue material. The first lens component includes a first lens sheet. The second lens component includes a second lens sheet, wherein the second lens sheet together with the first lens sheet constitute an imaging optical system optical system. The first glue material bonds the first lens component and the second lens component, wherein the first glue material surrounds an optical axis of the optical lens and is annular with at least one notch.