Optical Imaging Module Light Path Folding Stray Light Management
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Solution Overview
Problem
The challenge in the development of portable electronic devices is to create a compact optical imaging module with improved light path folding that reduces volume and effectively manages stray light, while maintaining high image quality.
Innovation Solution
An optical imaging module is designed with a light path folding element featuring an incident surface, emitting surface, and optical reflecting surfaces, combined with a light blocking element having an anti-reflective light blocking membrane layer with nanostructures, which reduces volume and minimizes stray light by shielding non-imaging light and optimizing the actual light path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a light path folding element is introduced to reduce the volume of the optical imaging module, then the volume is reduced, but stray light may increase due to additional optical interfaces
Solution Approach 1:
The patent applies anti-reflective membrane layers with nanostructures on the light path folding element surfaces. These nanostructures convert the harmful reflection (stray light) into beneficial light transmission by reducing surface reflectivity through gradient refractive index effects, thereby eliminating the negative impact of additional optical interfaces while maintaining the volume reduction benefit
Solution Approach 2:
The patent introduces opening holes in the light blocking element at positions corresponding to the incident surface and emitting surface of the light path folding element. This local modification allows imaging light to pass through while blocking stray light in other areas, achieving selective light management that addresses the stray light problem without compromising the overall compact design
2Object-generated harmful factors
If a light blocking element is added to shield stray light, then stray light is reduced, but the device complexity increases
Solution Approach 1:
The patent integrates the light blocking element with the existing optical imaging lens assembly structure. The light blocking element is positioned within the lens barrel and combines light blocking function with the mechanical support structure, thereby reducing device complexity compared to adding a separate, standalone light blocking component
Solution Approach 2:
The light blocking element serves multiple functions: it blocks stray light, provides mechanical support for positioning the light path folding element, and maintains the structural integrity of the optical module. This multi-functionality reduces the need for additional separate components, thereby reducing overall device 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 achieves a compact optical imaging module that effectively reduces volume and enhances image quality by minimizing stray light and optimizing the light path, making it suitable for telephoto imaging systems and other applications.
Implementation Method 1
the anti-reflective light blocking membrane layer with nanostructures, which reduces volume and minimizes stray light by shielding non-imaging light
Implementation Method 2
the light blocking surface has an anti-reflective light blocking membrane layer. A surface of the anti-reflective light blocking membrane layer has a plurality of nanostructures
Implementation Method 3
The light path folding element has an incident surface, an emitting surface and at least one optical reflecting surface
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. 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 one of the optical lens element and the light path folding element, and the light blocking element includes an opening hole and a light blocking surface. The light blocking surface has an anti-reflective light blocking membrane layer. A surface of the anti-reflective light blocking membrane layer has a plurality of nanostructures, and the nanostructures are arranged in an irregular form.