Imaging Lens Assembly Light Blocking Element Flare Reduction
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Solution Overview
Problem
The increasing demand for higher quality imaging lens assembly modules in portable electronic devices poses a challenge in reducing flare, which is exacerbated by advancements in technology.
Innovation Solution
The proposed imaging lens assembly module incorporates an imaging lens element set, at least one light folding element, and a plate-shaped light blocking element with layered structures and columnar air structures. The light blocking element maintains an air distance from the light folding and lens elements, optimizing the arrangement to reduce flare.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional imaging lens assembly module is used, then the structure is simple, but flare is generated and imaging quality deteriorates
Solution Approach 1:
The patent introduces a light blocking element as an intermediary component between the lens element and light folding element. This element includes a light blocking surface with specific geometric features (protrusions or recesses) that intercept and block stray light before it can reach the light folding element and cause flare. The light blocking element acts as a mediator that selectively blocks harmful light paths while maintaining the overall optical function of the system.
Solution Approach 2:
The light blocking surface of the light blocking element is designed with non-uniform geometric features (protrusions or recesses) at specific locations corresponding to the light folding element. This local quality modification allows selective blocking of stray light in critical areas while maintaining transparency or different properties in other areas, optimizing flare reduction without unnecessarily complicating the entire structure.
2Object-affected harmful factors
If the light blocking element is placed close to the light folding element, then the air distance is reduced, but flare reduction effectiveness decreases
Solution Approach 1:
The patent optimizes the air distance parameter between the light blocking element and light folding element within a specific range (0.05mm to 0.5mm). By carefully controlling this parameter, the design achieves effective flare reduction while maintaining a compact overall structure. The light blocking surface geometry (protrusion height or recess depth between 0.01mm to 0.1mm) is also parameterized to work effectively at these small air distances.
Solution Approach 2:
The light blocking element incorporates localized geometric features (protrusions or recesses) on its light blocking surface that are positioned to correspond with the light folding element. These local structural modifications enhance the element's ability to block stray light at the specific interface with the light folding element, maximizing flare reduction effectiveness within the constrained air distance.
3Object-affected harmful factors
If the light blocking element has a simple structure, then manufacturing is easy, but flare reduction effectiveness is insufficient
Solution Approach 1:
The light blocking element serves as an intermediary component that can be integrated into the existing imaging lens assembly module without requiring fundamental redesign of other components. Its relatively simple overall structure (a discrete element with a patterned surface) makes it manufacturable using conventional techniques such as molding or machining, while still achieving effective flare reduction through its strategically positioned geometric features.
Solution Approach 2:
The light blocking element features localized geometric modifications (protrusions or recesses) on its light blocking surface rather than complex overall structure. These local features can be manufactured using standard molding or machining processes, making the element relatively easy to produce despite the enhanced functionality. The simple base structure combined with localized modifications balances manufacturing ease with flare reduction effectiveness.
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 configuration effectively minimizes flare by preventing the generation of non-imaging light, thereby enhancing the imaging quality and reducing stray light, while also improving production efficiency and yield.
Implementation Method 1
The at least one light folding element includes an incident surface, an exit surface and at least one optical reflecting surface
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
An imaging lens assembly module includes an imaging lens element set, a light folding element and a plate-shaped light blocking element. The imaging lens element set has an optical axis, and includes a lens element. The light folding element is configured to fold the optical axis at least once, and includes an incident surface, an exit surface and an optical reflecting surface. The plate-shaped light blocking element keeps an air distance between the plate-shaped light blocking element and the light folding element, and includes two layered structures and columnar air structures. The layered structures are corresponding to the light folding element. The columnar air structures are farther away from the light folding element than a surface of the plate-shaped light blocking element from the light folding element, and the surface of the plate-shaped light blocking element faces toward the light folding element.