Imaging Lens Assembly Radial Reduction Light Blocking
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Solution Overview
Problem
The existing imaging lens assemblies in portable electronic devices face challenges in controlling light through holes effectively, leading to suboptimal image quality due to non-imaging light reflection, which is not adequately addressed by current technologies.
Innovation Solution
The proposed imaging lens assembly incorporates radial reduction lens and light blocking elements with non-circular designs, featuring optical effective portions and peripheral structures with light blocking structures arranged vertically along the optical axis, enhancing light blocking efficiency and image quality by reducing non-imaging light reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional light blocking elements with circular openings are used, then manufacturing is simple, but non-imaging light reflection is not adequately controlled
Solution Approach 1:
The patent applies asymmetry by changing the light blocking element from a conventional circular opening to a non-circular shape (such as rectangular or polygonal). This asymmetric design allows the light blocking element to more effectively control and block non-imaging light rays that enter at various angles, while the specific geometric shape can be optimized to match the angular distribution of stray light, thereby improving light blocking performance without requiring overly complex multi-component structures.
Solution Approach 2:
The patent extends the light blocking element into the radial dimension by creating a radial reduction light blocking element with a non-circular cross-section. This dimensional change from a simple planar circular aperture to a three-dimensional radially varying non-circular structure enables the element to block light rays from multiple angles simultaneously, effectively controlling non-imaging light reflection while maintaining a relatively simple single-element design.
2Object-affected harmful factors
If radial reduction light blocking elements with non-circular designs are implemented, then light blocking efficiency is enhanced, but manufacturing complexity increases
Solution Approach 1:
The patent merges the light blocking function with the structural support function by integrating the radial reduction light blocking element into the lens assembly housing or mounting structure. This combination allows the light blocking element to be manufactured as part of the existing structural components using conventional molding or machining processes, thereby reducing overall manufacturing complexity while maintaining the enhanced light blocking efficiency of the non-circular design.
Solution Approach 2:
The radial reduction light blocking element is designed to serve multiple functions: it blocks non-imaging light, provides structural support for the lens elements, and defines the optical aperture. This multi-functionality reduces the need for separate dedicated light blocking components, allowing the same element to be manufactured using standard processes already employed for structural components, thereby mitigating the increase in manufacturing complexity.
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
The solution effectively reduces non-imaging light reflection, thereby enhancing image quality by strategically arranging light blocking structures within the radial reduction light blocking elements, ensuring both high light blocking efficiency and improved manufacturing efficiency.
Implementation Method 1
The radial reduction light blocking element includes a central opening and a radial reduction part. The radial reduction part is reducing from a surface of the radial reduction light blocking element towards the optical axis along a direction vertical to the optical axis, so that the central opening is non-circular. The radial reduction part includes a plurality of light blocking structures.
Data Source
AI summary
An imaging lens assembly has an optical axis, and includes a plurality of optical elements. The optical axis passes through the optical elements, and the optical elements include a radial reduction lens element and a radial reduction light blocking element. The radial reduction lens element includes an optical effective portion and a peripheral portion. The peripheral portion is disposed around the optical effective portion along a circumferential direction of the optical axis. The radial reduction light blocking element includes a central opening and a radial reduction part. The optical axis passes through the central opening. The radial reduction part is reduced towards the optical axis along a direction vertical to the optical axis, so that the central opening is non-circular. The radial reduction part includes a plurality of light blocking structures. The light blocking structures are arranged along the direction vertical to the optical axis.