Image Sensor Module Low Refractive Index Filler
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Solution Overview
Problem
Image sensor modules suffer from deteriorated image quality due to phenomena such as flare and ghost images caused by diffused reflections between the image sensor and the filter, resulting from significant refractive index differences.
Innovation Solution
Incorporating a filler with a refractive index less than that of the filter, positioned between the image sensor and the filter, to minimize diffused reflections and promote vertical incidence of light, thereby reducing flare and ghost image effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a filter is coupled to the housing and disposed on the image sensor, then light filtering function is achieved, but diffused reflection occurs between the image sensor and the filter causing flare and ghost images
Solution Approach 1:
A filler material is introduced as an intermediary substance between the filter and the image sensor. This filler has a refractive index that is lower than that of the filter, creating a gradual refractive index transition that reduces the abrupt interface between components. This intermediary layer minimizes diffused reflection and prevents flare and ghost images while maintaining the light filtering function.
Solution Approach 2:
The refractive index parameter of the medium between the filter and image sensor is changed by introducing a filler material with a specific refractive index lower than the filter. This parameter change optimizes light transmission by reducing reflection at the interface, thereby eliminating the harmful optical effects without compromising the filter's functionality.
2Ease of manufacture
If air or conventional filling material is used between the image sensor and the filter, then manufacturing is simplified, but significant refractive index differences cause diffused reflection and image quality deterioration
Solution Approach 1:
The refractive index parameter of the filling material is specifically selected to be lower than that of the filter. This parameter optimization resolves the contradiction by maintaining the ease of manufacturing (using a simple filler material) while achieving the precision required for image quality (reduced diffused reflection through optimized refractive index matching).
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 low refractive index filler effectively prevents image quality deterioration by minimizing surface reflections and enhancing light incidence efficiency, resulting in improved image quality.
Implementation Method 1
a filler filled in between the image sensor and the filter inside the housing and having a refractive index that is less than a refractive index of the filter
Implementation Method 2
prevent deterioration of image quality due to a flare and a ghost image caused by diffused reflection between the image sensor and the filter
Data Source
AI summary
An image sensor module has a filler of a low refractive index and thus prevents deterioration of image quality due to a flare and a ghost image. The image sensor module includes an image sensor, a housing covering the image sensor, a filter coupled to the housing and disposed on the image sensor, and a filler filled in between the image sensor and the filter inside the housing and having a refractive index that is less than a refractive index of the filter.