Lens Assembly Rib Structure for Flare Reduction
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Solution Overview
Problem
The removal of spacers in optical devices to reduce cost can lead to flare issues, degrading product quality due to the lack of light adjustment and support for lenses.
Innovation Solution
Incorporating a rib structure into at least one lens of the lens assembly to prevent and reduce flare, while maintaining the optical performance and quality without the need for spacers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If spacers are removed to reduce cost, then production cost decreases, but flare issues occur degrading product quality
Solution Approach 1:
The patent merges the support function (originally performed by spacers) and the light adjustment function (originally performed by separate light control elements) into a single integrated lens structure. The rib structure is formed directly on the lens surface, combining structural support and optical control in one component, thereby eliminating the need for spacers while preventing flare.
Solution Approach 2:
The rib structure acts as an intermediary element on the lens surface that mediates between the need for structural support (without spacers) and the need for light control (to prevent flare). The ribs serve as intermediate structures that both mechanically support the lens and optically control stray light through their geometric configuration.
2Device complexity
If spacers are removed to simplify structure, then device complexity decreases, but lens support and light adjustment functions are lost
Solution Approach 1:
The patent combines multiple functions (lens support and light adjustment/flare prevention) into a single integrated rib structure on the lens. This merging reduces the number of separate components (simplifying structure) while maintaining both critical functions through the multi-functional design of the rib structure.
Solution Approach 2:
The rib structure on the lens surface performs multiple functions simultaneously: it provides mechanical support for the lens (replacing spacers) and controls stray light to prevent flare (replacing separate light control elements). This multi-functionality maintains reliability while reducing overall device complexity.
3Manufacturing precision
If multiple lenses are combined to achieve low F-number and small aberration, then image quality improves, but device complexity increases
Solution Approach 1:
The patent merges the support function and light control function into the lens elements themselves through the rib structure, rather than requiring separate support components and light control elements. This integration reduces overall device complexity while maintaining the multi-lens configuration needed for high image quality.
Data Source
AI summary
An optical device may include a lens assembly having multiple lenses aligned along an optical axis direction from an object-side toward an image-side, and a lens barrel configured to at least partially surround the lens assembly. Among the multiple lenses included the lens assembly, at least one of lenses positioned between the first lens and the last lens from the object-side may be configured such that a ratio of a height from a starting point of a non-effective diameter of the lens to a starting point of a seat surface of the lens, and a distance from the starting point of the non-effective diameter to a portion of the lens in contact with the inner surface (the outer diameter) of the barrel exceeds 0.5. The lens assembly may be various according to an embodiment. In addition, a lens assembly and an electronic device including the same according to the embodiment may be provided.