Imaging Lens Spacing Part Stray Light Elimination
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Solution Overview
Problem
Conventional imaging lenses suffer from stray light issues due to the thickness of spacing modules, which causes flare and ghost effects, particularly affecting the imaging module closest to the object side, and existing solutions like plastic and punched spacing parts are inadequate in light absorption and are complex, increasing costs.
Innovation Solution
The design incorporates a plastic spacing part with a specific geometry, featuring a first reflecting surface as a horizontal plane and a second reflecting surface as a slope surface, allowing light to be reflected twice for enhanced absorption, thereby eliminating stray light effectively and simplifying the structure to reduce material costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a plastic spacing part is used to eliminate stray light, then light absorption is improved, but the structure becomes complex and manufacturing cost increases
Solution Approach 1:
The patent combines the light-absorbing function and spacing function into a single integrated component. The spacing part is designed with light-absorbing material and specific geometric features (protrusions and recesses) that eliminate stray light while maintaining the necessary spacing between imaging modules, thereby avoiding the need for separate light-absorbing components and reducing overall structural complexity
Solution Approach 2:
The spacing part features localized light-absorbing structures at specific positions where stray light problems occur. The protrusions and recesses are strategically positioned to target stray light paths from specific imaging modules, providing focused stray light elimination rather than requiring uniform light absorption throughout the entire structure
2Object-affected harmful factors
If multiple spacing parts are installed to eliminate stray light from different imaging modules, then light absorption is improved, but manufacturing cost increases
Solution Approach 1:
The spacing part is designed as a multi-functional component that simultaneously performs spacing between imaging modules and stray light elimination for multiple modules. The geometric features (protrusions and recesses) are configured to address stray light from both the first and second imaging modules through a single component, eliminating the need for multiple separate light-absorbing parts and reducing material costs
3Object-affected harmful factors
If the spacing part has sufficient thickness to absorb stray light, then light absorption is improved, but the imaging module size increases
Solution Approach 1:
The spacing part incorporates light-absorbing material with specific optical properties that enable effective stray light absorption in a compact form. The material's optical characteristics allow sufficient light absorption capability within a reduced thickness, preventing stray light while minimizing the volume occupied by the spacing part and keeping the imaging module compact
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 significantly increases light absorption, effectively eliminating stray light and reducing material costs by simplifying the lens structure, thereby improving imaging quality and reducing production expenses.
Implementation Method 1
a plurality of light-absorbing materials are respectively and alternately arranged in the first spacing part and the second spacing part
Implementation Method 2
the first reflecting surface as a horizontal plane and a second reflecting surface as a slope surface, allowing light to be reflected twice for enhanced absorption
Data Source
AI summary
An imaging lens is disclosed and has an optical axis. The image lens includes a lens barrel having a lens barrel wall arranged around the optical axis and forming an accommodation space; an imaging module including a plurality of near object units and near image units separated from each other and arranged in an order from an object side to an image side in the accommodation space; and a spacing part sandwiched between the near object units and the near image units. The spacing part includes a first reflecting surface facing the near image units and a second reflecting surface connected with the first reflecting surface, the light from the near image units is reflected two times by the first reflecting surface and the second reflecting surface.