Lens Module Spacer Light Absorbing Layer Flare Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In camera modules with stacked lenses, light reflected from the wall surface of spacers can cause flare phenomena, leading to a deterioration in image quality due to unwanted light being reflected onto the image sensor.
Innovation Solution
The lens module incorporates spacers with light blocking holes, where the wall surface forming the holes features inclined, curved, or perpendicular surfaces coated with a light-absorbing layer to prevent light reflection, ensuring that incident light passes through without being reflected back onto the image sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a light blocking hole is formed in the spacer to allow light to pass through, then light transmission is enabled, but light reflection from the wall surface causes flare phenomenon
Solution Approach 1:
The patent applies the light absorbing layer to convert the harmful reflection from the spacer wall surface into beneficial light absorption. The light absorbing material transforms the reflected light energy into heat, eliminating the flare phenomenon while maintaining the light transmission function of the light blocking hole.
Solution Approach 2:
The patent applies different properties to different parts of the spacer: the light blocking hole wall surface is coated with a light absorbing layer to prevent reflection, while other parts of the spacer maintain their original light blocking function. This localized treatment solves the reflection problem without compromising the overall light management function of the spacer.
2Ease of manufacture
If the spacer wall surface is made smooth to facilitate manufacturing, then manufacturing ease is improved, but light reflection increases causing image quality deterioration
Solution Approach 1:
The patent applies a light absorbing coating specifically to the light blocking hole wall surface of the spacer. This localized treatment allows the spacer body to maintain its simple smooth structure for easy manufacturing, while the coated hole surface effectively prevents light reflection.
Solution Approach 2:
The patent creates a composite structure by combining the spacer material with a light absorbing coating material on its surface. This composite approach maintains the structural integrity and manufacturability of the spacer while adding the light absorption property to eliminate reflection.
3Object-generated harmful factors
If a light absorbing layer is added to the spacer wall surface to prevent reflection, then flare phenomenon is reduced, but device complexity increases
Solution Approach 1:
The light absorbing layer is applied only to the specific region where light reflection occurs (the light blocking hole wall surface) rather than the entire spacer. This localized approach prevents flare while minimizing the increase in device complexity by treating only the necessary area.
Solution Approach 2:
The light absorbing layer acts as an intermediary substance between the spacer structure and the light. It mediates the interaction by absorbing light energy that would otherwise be reflected, thereby preventing flare without requiring fundamental changes to the spacer structure.
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 prevents light from being reflected by the spacer surfaces, thereby enhancing image quality by minimizing flare effects and maintaining clear image transmission.
Implementation Method 1
a light absorbing layer is disposed on a wall surface of the spacer forming the light blocking hole
Data Source
AI summary
A lens module includes a lens barrel, a plurality of lenses disposed in the lens barrel and aligned along an optical axis, and a spacer, disposed between the plurality of lenses, comprising a light blocking hole configured to allow light incident to the plurality of lenses to pass therethrough, wherein a light absorbing layer is disposed on a wall surface of the spacer forming the light blocking hole.