Annular Optical Spacer Protrusions Suppress Reflections
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Solution Overview
Problem
Conventional optical spacers with smooth surfaces fail to effectively suppress unexpected light reflections, leading to poor image quality in high-end camera systems, as the reflected light tends to enter the optical effective region, compromising image quality.
Innovation Solution
An annular optical spacer with protruding structures on its inner surface, which are regularly disposed to extend from the first side surface to the second side surface, increasing the surface area for light absorption and guiding reflected light away from the optical effective region, thereby enhancing image quality and structural strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a smooth surface is used on the optical spacer, then the manufacturing process is simple, but the reflected light enters the optical effective region causing poor image quality
Solution Approach 1:
The optical spacer surface is divided into different regions with different properties: the light incident surface remains smooth for easy manufacturing, while the light reflected surface contains protruding structures to suppress reflected light. This local differentiation resolves the contradiction between manufacturing simplicity and light reflection control.
Solution Approach 2:
The reflected light surface is segmented into multiple protruding structures that are regularly disposed on the optical spacer. This segmentation breaks up the reflected light into multiple directions, preventing it from entering the optical effective region while maintaining manufacturing feasibility.
2Object-affected harmful factors
If protruding structures are added to suppress reflected light, then image quality improves, but the structural strength of the optical spacer may be compromised
Solution Approach 1:
The protruding structures are designed with optimized parameters including height between 0.01-0.1mm, density of 10-100 structures per square millimeter, and regular geometric shapes. These parameter optimizations ensure sufficient light suppression while maintaining structural integrity and strength of the optical spacer.
3Volume of moving object
If the optical system is made compact to meet mobile device requirements, then device size is reduced, but light reflection control becomes more difficult
Solution Approach 1:
Instead of increasing the axial thickness of the optical spacer to accommodate light suppression features, the solution uses surface protrusions that extend radially outward from the reflected light surface. This dimensional approach allows effective light suppression without increasing the overall optical system length, maintaining compactness while controlling reflected light.
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 annular optical spacer effectively suppresses unexpected light reflections, improving image quality and structural strength by guiding reflected light to a predetermined direction, thus enhancing the performance of compact optical lens systems.
Implementation Method 1
increasing the surface area for light absorption and guiding reflected light away from the optical effective region
Implementation Method 2
when an incident light M1 strikes the surface 11, a reflected light R1 is formed complying with the law of reflection
Data Source
AI summary
An annular optical spacer includes an outer annular surface, an inner annular surface, a first side surface, a second side surface and a plurality of protruding structures. The inner annular surface surrounds a central axis of the annular optical spacer and is opposite to the outer annular surface. The first side surface connects the outer annular surface with the inner annular surface. The second side surface connects the outer annular surface with the inner annular surface and is opposite to the first side surface. The protruding structures are regularly disposed on the inner annular surface. Each of the protruding structures extends along a direction from the first side surface to the second side surface and is integrated with the inner annular surface.