Non-Circular Light Blocking Opening for Stray Light Control
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Solution Overview
Problem
Conventional imaging lens assembly modules face challenges in minimizing stray light while maintaining high image quality, particularly during miniaturization, where light blocking openings tend to shrink and increase stray light intensity.
Innovation Solution
The proposed imaging lens assembly module incorporates a light blocking structure with a non-circular shape, featuring arc portions and a shrinking portion with protruding arcs, which reduces stray light and improves image quality by controlling the light blocking opening's dimensions and area effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the light blocking opening is shrunk during miniaturization, then the device size is reduced, but the stray light intensity increases
Solution Approach 1:
The patent applies asymmetry by transforming the conventional circular light blocking opening into a non-circular shape with specific geometric features including arc portions and a shrinking portion. This asymmetric design allows the opening to maintain an effective light blocking area that prevents stray light while accommodating the reduced device size, thereby resolving the contradiction between miniaturization and stray light control
Solution Approach 2:
The patent employs curvature principles by incorporating arc portions with specific radius ratios in the light blocking opening design. The curved geometry of the non-circular opening, particularly the relationship between the arc radius and the opening dimensions, enables optimized light path control that reduces stray light intensity while maintaining compact device dimensions
2Device complexity
If a conventional circular light blocking opening is used, then the structure is simple, but the stray light cannot be effectively reduced
Solution Approach 1:
The patent deliberately introduces asymmetry by replacing the symmetric circular opening with a non-circular configuration featuring arc portions and a shrinking portion. This asymmetric geometry creates specific light blocking patterns that are more effective at preventing stray light compared to conventional circular designs, while the overall structure remains relatively simple to manufacture
Solution Approach 2:
The patent applies local quality by creating regions with different geometric properties within the light blocking opening. The arc portions and shrinking portion create localized areas with specific curvature and dimension characteristics that are optimized for light blocking, while other regions maintain simpler geometry, achieving effective stray light reduction without uniformly increasing complexity
Data Source
AI summary
An imaging lens assembly module includes an imaging lens element set, a lens carrier and a light blocking structure. The imaging lens element set has an optical axis. At least one lens element of the lens elements is disposed in the lens carrier. The light blocking structure includes a light blocking opening. The optical axis passes through the light blocking opening, and the light blocking opening includes at least two arc portions and a shrinking portion. Each of the arc portions has a first curvature radius for defining a maximum diameter of the light blocking opening. The shrinking portion is connected to the arc portions for forming the light blocking opening into a non-circular shape. The shrinking portion includes at least one protruding arc which extends and shrinks gradually from the shrinking portion to the optical axis, and the protruding arc has a second curvature radius.