Integrated Image Sensor Infrared Filter Adhesive Refractive Index
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Solution Overview
Problem
The proximity of the lens and infrared cut filter to the solid state image sensor in camera devices leads to increased occurrence of flare and ghost due to internal diffuse reflection, hindering size reduction and height reduction efforts in camera configurations.
Innovation Solution
An imaging apparatus configuration that integrates a glass substrate and an attenuating infrared optical element with the image sensor, using an adhesive layer to bond these components, thereby maintaining a unified refractive index and reducing internal diffuse reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the lens and infrared cut filter are arranged close to the solid state image sensor to achieve size reduction, then the device configuration size and height are reduced, but the distance between the infrared cut filter and lens becomes smaller causing ghost and flare due to internal diffuse reflection
Solution Approach 1:
An adhesive layer with refractive index matching is introduced as an intermediary between the infrared cut filter and the solid state image sensor. This adhesive layer acts as a mediator that reduces internal diffuse reflection at the interface, thereby preventing ghost and flare while allowing the components to be arranged in close proximity for size reduction
Solution Approach 2:
The refractive index parameter of the adhesive layer is specifically selected to match the optical properties of the adjacent components (infrared cut filter and sensor). By changing and optimizing the refractive index parameter, the optical interface minimizes reflection and eliminates the harmful effects of internal diffuse reflection
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 achieves size and height reduction while preventing flare and ghost occurrences, enhancing image quality by minimizing internal diffuse reflection.
Implementation Method 1
maintaining a unified refractive index and reducing internal diffuse reflection
Implementation Method 2
a ghost and a flare occur due to internal diffuse reflection by light reflection
Data Source
AI summary
There is provided an imaging apparatus including: a solid state image sensor configured to generate a pixel signal by photoelectric conversion in accordance with a light amount of an incoming light; an integrated configuration unit configured to integrate a function for fixing the solid state image sensor and a function for removing an infrared light of the incoming light.