Micro-lens Module Aspheric Complex Lens Reflection Control
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Solution Overview
Problem
Current micro-camera lenses in portable electronic devices suffer from poor imaging quality due to significant reflection issues between different material interfaces, despite their miniaturized size.
Innovation Solution
A micro-lens module comprising a first lens group with positive refractive power and a second lens group with negative refractive power, both composed of complex lenses with varying refractive indices, including aspheric surfaces and transparent flat lenses, to minimize reflections and enhance imaging quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the lens size is reduced to satisfy portability demands, then the device size is minimized, but imaging quality deteriorates due to serious reflection problems between interfaces of different materials
Solution Approach 1:
The patent applies composite materials by constructing lens groups with multiple lenses having different refractive indices (e.g., first lens with refractive index 1.5, second lens with refractive index 1.7). This multi-material composition reduces reflection problems at interfaces while maintaining the compact lens structure, thereby improving imaging quality without increasing overall size.
Solution Approach 2:
The patent segments the lens system into multiple discrete lenses (first lens, second lens, third lens, fourth lens) arranged in sequence within lens groups. Each lens can be optimized independently for its specific optical function, allowing better control of light paths and reduction of reflection issues while maintaining compact dimensions.
2Manufacturing precision
If multiple lenses with different refractive indices are used to reduce reflection, then imaging quality is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple lenses with different refractive indices into integrated lens groups (first lens group and second lens group) that function as unified optical units. Each lens group combines lenses of different materials to achieve reflection reduction while presenting a compact, integrated structure that manages complexity through functional consolidation.
Solution Approach 2:
The patent applies local quality by assigning different refractive indices to specific lenses at different positions within the lens groups. For example, the first lens has refractive index 1.5 while the second lens has refractive index 1.7, optimizing each local region for its specific optical requirements to reduce reflection while maintaining overall system compactness.
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 module achieves improved imaging quality while maintaining a compact size, as demonstrated by optical simulation data showing reduced field curvature and distortion, thus addressing the reflection issues in existing micro-camera lenses.
Implementation Method 1
a surface of the second lens facing the image side is an aspheric surface
Implementation Method 2
it has a poor imaging quality due to a serious reflection problem between interfaces of different materials
Data Source
AI summary
A micro-lens module including a first lens group and a second lens group is provided. The first lens includes a first lens and a second lens arranged in sequence from the object side to the image side. The second lens is closest to the image side in the first lens group, and a surface of the second lens facing the image side is an aspheric surface. The second lens group includes a third lens and a fourth lens arranged in sequence from the object side to the image side. The first lens group is composed of a first complex lens. The first complex lens includes a plurality of lenses. The lenses are adhered to each other, and a refractive index of at least one lens in the lenses is different from refractive indexes of the other lenses.