Mobile Lens Coating Structure for Low-Reflection Imaging
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Solution Overview
Problem
Existing lenses in mobile electronic devices suffer from aberration and flare phenomena due to internal reflections, which degrade image quality and resolution, and there is a need to minimize light transmittance and reflectance in the visible ray region.
Innovation Solution
A lens design featuring an uneven layer with a buffer layer and a water-repellent layer, where the buffer layer conforms to the uneven surface and has a thickness greater than the water-repellent layer, reducing reflectivity through irregular surface structures and chemical bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a combination of various lenses is used to calibrate aberration, then image sharpness is improved, but device complexity increases
Solution Approach 1:
The lens surface is segmented into multiple functional layers (uneven layer, buffer layer, water-repellent layer) that work together to reduce reflection and flare, achieving image quality improvement without adding multiple lens elements
Solution Approach 2:
A buffer layer is introduced as an intermediary between the uneven layer and water-repellent layer to enhance adhesion and maintain the uneven surface structure, enabling the anti-flare coating system to function effectively without complicating the lens optical design
2Measurement precision
If light transmittance and reflectance are minimized in the visible ray region to prevent flare, then image quality is improved, but light loss increases
Solution Approach 1:
The uneven layer is applied locally on the lens surface rather than using multiple lens elements throughout the optical path, reducing reflection and flare at the critical air-lens interface without affecting other optical properties
Solution Approach 2:
The surface roughness parameter of the uneven layer is optimized (Ra of 10-100 nm) to achieve the balance between reducing reflection (improving image quality) and maintaining sufficient light transmission (minimizing light loss)
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 design effectively lowers reflectivity to 2% or less, enhancing image sharpness and reducing flare occurrences, thereby improving image quality and resolution.
Implementation Method 1
an uneven layer formed on at least a portion of a surface of the lens unit
Implementation Method 2
The uneven layer may include an uneven structure having an irregular shape
Implementation Method 3
The water-repellent layer may form a chemical bond with the buffer layer
Implementation Method 4
a buffer layer covering the uneven layer and having a shape conforming to an uneven surface of the uneven layer
Data Source
AI summary
A lens includes a lens unit, an uneven layer formed on at least a portion of a surface of the lens unit, a buffer layer covering the uneven layer and having a shape conforming to an uneven surface of the uneven layer, and a water-repellent layer covering the buffer layer.