Imaging Lens Nano-Microstructure Anti-Reflection Design
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Solution Overview
Problem
The challenge in developing imaging lens assemblies for portable electronic devices is to reduce light reflection effectively, as existing technologies fail to meet the increasing quality requirements, leading to image quality issues due to flare and other optical imperfections.
Innovation Solution
The proposed imaging lens assembly incorporates a nano-microstructure with irregular ridged convexes and an annular retaining element with a light-through hole, which reduces light reflection by physically contacting optical lens elements within a lens barrel, enhancing image quality by minimizing flare and improving relative illuminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional lens assemblies are used, then the structure is simple and easy to manufacture, but light reflection causes flare and degraded image quality
Solution Approach 1:
The patent applies parameter changes by introducing a nano-microstructure layer with specific physical and chemical properties onto the lens surface. This layer has a refractive index and surface morphology that differ from conventional smooth surfaces, enabling reduced light reflection through gradient refractive index effects and surface texture control, thereby resolving the contradiction between maintaining simple structure and reducing harmful light reflection
Solution Approach 2:
The patent employs composite materials by combining the conventional lens material with a nano-microstructure coating layer. This composite structure integrates the optical properties of the base lens material with the anti-reflective properties of the nano-microstructure layer, achieving reduced flare while maintaining the overall structural simplicity and manufacturability of the original lens assembly
2Object-affected harmful factors
If anti-reflective coatings are applied, then light reflection is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent changes the parameter of surface morphology from smooth to nano-microstructured, creating a gradient refractive index effect that reduces reflection. This approach achieves anti-reflective functionality through physical structure rather than requiring precise control of thin-film coating thickness and composition, thereby reducing manufacturing precision requirements while effectively minimizing flare
Solution Approach 2:
The nano-microstructure creates a porous or textured surface morphology on the lens. This porous structure provides a gradient transition of refractive index from air to lens material, reducing reflection at the interface. The porous nature allows for tolerance in manufacturing while maintaining the anti-reflective effect, thus lowering the precision requirements compared to conventional dense thin-film coatings
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 light reflection, enhancing image quality by eliminating flare and improving relative illuminance within the specified range, thereby meeting the higher quality requirements for portable electronic devices.
Implementation Method 1
The nano-microstructure has a plurality of irregular ridged convexes... effectively reduces light reflection... improving relative illuminance
Data Source
AI summary
An imaging lens assembly includes a lens barrel, optical lens elements, an annular retaining element and a nano-microstructure. The optical lens elements include at least one optical lens element disposed in the lens barrel. The annular retaining element is physically contacted with the optical lens element, and the annular retaining element includes an object-side surface, an image-side surface, an outer diameter surface and a light-through hole. The outer diameter surface is connected to the object-side surface and the image-side surface. The light-through hole is formed by gradually tapering from the object-side surface and the image-side surface towards the optical axis. The nano-microstructure has a plurality of irregular ridged convexes. The nano-microstructure is located between a lens barrel area defined via the lens barrel and a lens element area defined via the optical lens element on a direction vertical to the optical axis.