Cemented Image Capturing Lens for Tighter Assembly Tolerance
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Solution Overview
Problem
Existing image capturing lenses for portable electronic devices face challenges in assembly tolerance and production yield due to the use of discrete lenses, which affect imaging quality and efficiency.
Innovation Solution
The implementation of a cemented lens configuration, specifically combining the fourth and fifth lenses, reduces assembly tolerance and improves production yield while maintaining good imaging quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If discrete lenses are used in the image capturing lens, then the lens assembly can be easily manufactured and assembled, but the assembly tolerance between each lens increases, affecting imaging quality and production yield
Solution Approach 1:
The patent combines the fourth lens and fifth lens into a single cemented lens element. This merging eliminates the air gap between the two lenses and removes the need for precise alignment and spacing control that would be required if they were separate discrete lenses. The cemented lens structure inherently fixes the relative position of the two lens surfaces, thereby reducing assembly tolerance while maintaining manufacturing feasibility.
2Adaptability or versatility
If multiple discrete lenses are used to achieve diverse design requirements, then the lens can meet various imaging specifications, but the assembly tolerance between each lens increases, reducing production yield
Solution Approach 1:
The patent merges the fourth and fifth lenses into a cemented lens structure, which reduces the number of separate components that need to be assembled. This eliminates the assembly tolerance issues between these two lenses while preserving the optical design's ability to meet diverse imaging specifications through the remaining discrete lenses and the optimized cemented lens parameters.
3Ease of operation
If discrete lenses are used, then each lens can be independently manufactured and adjusted, but the assembly tolerance between lenses affects imaging quality
Solution Approach 1:
The cemented lens structure combines two lens elements into a single integrated component. This eliminates the need for independent assembly and adjustment of the fourth and fifth lenses, thereby removing the assembly tolerance variable. The optical design compensates for this by optimizing the cemented lens parameters to achieve the desired imaging quality without requiring post-assembly adjustments.
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 cemented lens design enhances imaging quality by minimizing assembly tolerance issues and improving production efficiency, ensuring high-resolution performance.
Implementation Method 1
the fourth lens and the fifth lens form a cemented lens
Data Source
AI summary
An image capturing lens sequentially includes a first lens to a seventh lens from an object side to an image side along an optical axis. The first lens has a positive refracting power. The second lens has a negative refracting power. The third lens has a positive refracting power. The fourth lens has a negative refracting power. The fifth lens has a positive refracting power. The fourth lens and the fifth lens form a cemented lens. The sixth lens has a positive refracting power. The seventh lens has a negative refracting power.