Imaging Lens Assembly Shaped Opening for Stray Light Reduction
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Solution Overview
Problem
Existing imaging lens assembly modules in portable electronic devices suffer from high stray light intensity due to miniaturization, which compromises image quality.
Innovation Solution
The design incorporates a light blocking structure with a light blocking opening featuring arc portions and a shrinking portion with protruding arcs, controlled by a driving device, to manage incident light and reduce stray light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the imaging lens assembly module is miniaturized to fit portable electronic devices, then the device size is reduced, but stray light intensity increases compromising image quality
Solution Approach 1:
The light blocking structure is divided into multiple functional portions: a light blocking opening for controlling incident light, arc portions for defining the opening boundary, and a shrinking portion with protruding arcs for reducing stray light. This segmentation allows each portion to address specific aspects of the stray light problem independently while working together to maintain image quality in a miniaturized module.
Solution Approach 2:
The light blocking structure implements local quality variations through different geometric features at different locations. The arc portions have a first curvature radius defining the maximum diameter, while the protruding arcs in the shrinking portion have a second curvature radius that creates a gradual transition. This localized geometric differentiation optimizes light blocking effectiveness at specific critical areas without requiring complete redesign of the entire structure.
2Object-generated harmful factors
If a light blocking structure is added to reduce stray light, then image quality is improved, but device complexity increases
Solution Approach 1:
The light blocking structure merges multiple functions into a single integrated component: it serves as an aperture stop for controlling incident light amounts, a stray light reduction element through its shrinking portion design, and a structural element that can be mounted on the lens carrier. This consolidation reduces the number of separate components needed while achieving multiple optical control objectives simultaneously.
Solution Approach 2:
The light blocking structure is designed with universal applicability by incorporating geometric features that perform multiple functions. The arc portions define the light blocking opening for aperture control, while the protruding arcs in the shrinking portion simultaneously reduce stray light and can guide light paths. This multi-functionality allows a single component to address various optical issues without requiring additional specialized elements.
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
This design effectively minimizes stray light intensity and enhances image quality while maintaining module miniaturization, achieving better image capturing efficiency.
Implementation Method 1
The light blocking structure is a light blocking sheet mounted on the lens carrier, is located on an image side of the at least one lens element, and includes a light blocking opening
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.