Imaging Sensor Glass and IR Filter Layout for Flare Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In solid-state imaging elements with a CSP structure, reflected light from the glass substrate and air boundary causes flare or ghosting in captured images, degrading image quality, and reducing the glass substrate thickness to mitigate this issue compromises the structural strength of the imaging element.
Innovation Solution
A solid-state imaging apparatus with a glass substrate thinner than the infrared cut filter, where the infrared cut filter is positioned on the opposite surface via a cavity layer, and both are fixed with a transparent adhesive to prevent light reflection and ensure structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the thickness of the glass substrate is reduced to reduce reflected light, then image quality is improved, but the structural strength of the imaging element is reduced
Solution Approach 1:
An infrared cut filter is introduced as an intermediary component between the glass substrate and the external environment. This filter serves dual functions: it blocks infrared light from reaching the imaging element, and it provides additional structural support that compensates for the reduced thickness of the glass substrate, thereby maintaining overall structural strength while allowing the glass substrate to be thinner to reduce reflected light
Solution Approach 2:
The imaging element employs a composite structure combining the glass substrate with an infrared cut filter layer. This composite construction allows the glass substrate to be made thinner for reduced light reflection while the filter layer provides necessary structural reinforcement, achieving both optical performance improvement and mechanical strength maintenance
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 reduces flare and ghosting in captured images while maintaining the structural strength of the imaging apparatus, even with a thinner glass substrate, thereby improving image quality without compromising reliability.
Implementation Method 1
an infrared cut filter that is arranged on a second surface of the glass substrate via a cavity layer
Implementation Method 2
an infrared cut filter that is arranged on a second surface of the glass substrate via a cavity layer
Data Source
AI summary
An imaging apparatus according to an embodiment includes: a solid-state imaging element (11) that has a light-receiving surface on which light-receiving elements are arranged in a two-dimensional matrix manner, a glass substrate (20) that is arranged on the light-receiving surface of the solid-state imaging element, and an infrared cut filter (22) that is arranged on a second surface of the glass substrate via a cavity layer (23), where the second surface is opposite to a first surface facing the light-receiving surface.