Light Path Folding Module With Non-Closed Ring Blocking
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Solution Overview
Problem
The challenge in developing camera modules for portable electronic devices is to improve imaging quality while effectively blocking non-imaging light to maintain clear images.
Innovation Solution
A light path folding module with a light path folding element and an opaque body, featuring a non-closed ring structure and light blocking structures, is designed to fold optical axes and block non-imaging light by arranging light blocking structures along the optical axes, ensuring angles and numbers of structures satisfy specific conditions to enhance light blocking performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If light blocking structures are added to block non-imaging light, then image quality is improved, but device complexity increases
Solution Approach 1:
The patent merges the light blocking function with the existing opaque body structure by integrating light blocking structures directly into it. This combining approach allows the system to block non-imaging light without adding separate, independent components, thereby improving image quality while minimizing the increase in device complexity.
Solution Approach 2:
The opaque body is segmented into multiple light blocking structures (first, second, third light blocking structures) positioned at different locations. This segmentation allows targeted blocking of specific non-imaging light paths while maintaining the overall simplicity of the integrated structure, achieving effective light control without excessive complexity.
2Reliability
If multiple light blocking structures are arranged along optical axes, then non-imaging light blocking performance is improved, but manufacturing precision requirements increase
Solution Approach 1:
Different light blocking structures are designed with different local characteristics: the first light blocking structure has a first width, the second has a second width, and the third has a third width. This local quality differentiation allows each structure to be optimized for its specific function while providing guidance for manufacturing, reducing the overall precision requirements compared to uniform high-precision structures.
Solution Approach 2:
The light blocking structures are arranged asymmetrically along the optical axes with varying widths and positions. This asymmetric arrangement creates distinct light blocking zones that are easier to manufacture with standard tolerances, while still achieving effective non-imaging light blocking. The asymmetric design provides manufacturing flexibility compared to symmetric high-precision requirements.
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 blocks non-imaging light, improving image quality and maintaining clarity by destroying the reflection paths of non-imaging light, thus enhancing the optical design margin and image capture capabilities.
Implementation Method 1
The light path folding element is for folding an incident optical axis to an exiting optical axis
Implementation Method 2
The plurality of light blocking structures extend towards the exiting optical axis from the non-closed ring structure along a direction perpendicular to the exiting optical axis
Data Source
AI summary
A light path folding module includes a light path folding element and an opaque body. The light path folding element is for folding an incident optical axis to an exiting optical axis, and the light path folding element includes a light incident surface and a light exiting surface. The opaque body is disposed relative to the light path folding element, and the opaque body includes a non-closed ring structure and a plurality of light blocking structures. The exiting optical axis passes through a notch opening of the non-closed ring structure. The light blocking structures extend toward the exiting optical axis from the non-closed ring structure along a direction perpendicular to the exiting optical axis, wherein the light blocking structures are disposed adjacent to the light exiting surface of the light path folding element.