Optical Imaging Module with Anti-Reflective Light Blocking Element
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Solution Overview
Problem
The challenge in the industry is to develop a folding optical imaging module that reduces the volume of the optical imaging module by utilizing a light path folding element while maintaining high imaging quality, as the quality requirements of optical imaging modules in portable electronic devices continue to rise with advancing technology.
Innovation Solution
The optical imaging module incorporates an optical imaging lens assembly, a light path folding element with incident, emitting, and reflecting surfaces, and a light blocking element with anti-reflective structures. The light blocking element is strategically positioned to minimize stray light reflection, allowing for miniaturization and improved imaging quality through the use of anti-reflective structures and orthogonal orientations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a light path folding element is used to reduce module volume, then the volume of the optical imaging module is reduced, but stray light reflection increases
Solution Approach 1:
The patent applies anti-reflective structures on the light blocking element to convert the harmful stray light reflection into beneficial light absorption or scattering. The anti-reflective structures are specifically designed to reduce the reflection of stray light while maintaining the light path folding function, thus converting the harmful effect into a beneficial one.
Solution Approach 2:
The patent introduces anti-reflective structures at specific locations on the light blocking element where stray light reflection occurs. This local modification of surface properties (adding anti-reflective coating or micro-structures) addresses the stray light problem without affecting the overall light path folding functionality, applying the local quality principle by treating only the problematic areas.
2Manufacturing precision
If anti-reflective structures are added to minimize stray light, then imaging quality is improved, but device complexity increases
Solution Approach 1:
The patent integrates the anti-reflective structures directly onto the light blocking element, merging the light blocking function with the anti-reflective function into a single component. This integration reduces device complexity by eliminating the need for separate anti-reflective treatments or additional components, while still achieving improved imaging quality.
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 reduces the module's volume and enhances imaging quality by minimizing stray light reflection, facilitating the production process, and improving anti-reflective performance, making it suitable for portable electronic devices.
Implementation Method 1
The light path folding element has an incident surface, an emitting surface and at least one optical reflecting surface
Implementation Method 2
The light blocking surface has a plurality of first anti-reflective structures, and each of the first anti-reflective structures is recessed from the light blocking surface toward a direction away from the light path folding element
Data Source
AI summary
An optical imaging module includes an optical imaging lens assembly, a light path folding element and a light blocking element. The optical imaging lens assembly includes at least one optical lens element, and an optical axis passes through the optical lens element. The light path folding element has an incident surface, an emitting surface and at least one optical reflecting surface, and the light path folding element is disposed on an image side of the optical imaging lens assembly. The light blocking element is disposed on at least one of the optical lens element and the light path folding element, and includes an opening hole and a light blocking surface. The light blocking surface has a plurality of first anti-reflective structures, and each of the first anti-reflective structures is recessed from the light blocking surface toward a direction away from the light path folding element.