Radiological Image Conversion Panel Columnar Reflection Films
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In radiological image conversion panels, light leakage from columnar structures compromises image quality, as existing solutions like metal reflection films are ineffective in confining light within the intended photoelectric conversion elements.
Innovation Solution
A method involving the formation of columnar structures with reflection films made of inorganic materials, where the reflection films cover the outer surfaces of the structures and gaps between them, ensuring light is reflected along the entire length of the structures, including the interfaces and gap surfaces, thereby suppressing leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a metal reflection film is formed to fill the gaps between the front ends of adjoining columnar structures, then light reflection at the interface between columnar structures and reflection film is improved, but light leakage suppression is limited because there is no reflection film on the side of the base end of the substrate
Solution Approach 1:
The reflection film is segmented into multiple sections: a first reflection film covering the front end of columnar structures, a second reflection film covering the base end of columnar structures, and optionally a third reflection film filling gaps between adjacent columnar structures. This segmentation allows each section to perform specific light reflection functions, comprehensively suppressing light leakage from both front and base ends.
Solution Approach 2:
The solution extends the light confinement approach from one dimension (front end only) to two dimensions by adding reflection films at both the front end and base end of columnar structures. This dimensional extension ensures light is confined throughout the entire length of the columnar structures, effectively preventing light leakage.
2Illumination intensity
If the front end of the group of columnar structures is covered with a reflection film, then light propagation within columnar structures is improved, but light leakage to the outside of columnar structures cannot be effectively suppressed due to the absence of reflection film at the base end
Solution Approach 1:
The reflection film system is divided into multiple functional segments: first reflection film at the front end for light propagation enhancement, second reflection film at the base end for light leakage prevention, and third reflection film in gaps for additional confinement. This segmentation addresses both light propagation and light leakage issues simultaneously.
Solution Approach 2:
Different regions of the columnar structures are assigned different reflection film configurations tailored to local needs: the front end receives reflection film to enhance light propagation toward photoelectric conversion elements, the base end receives reflection film to prevent light leakage back toward the substrate, and gaps receive reflection film for additional confinement.
3Reliability
If reflection films are formed to cover the entire outer surface of columnar structures including gaps, then light confinement within columnar structures is enhanced, but manufacturing complexity increases
Solution Approach 1:
The manufacturing process is segmented into distinct steps: forming the first reflection film at the front end, forming the second reflection film at the base end, and optionally forming the third reflection film in gaps. This segmentation allows each reflection film to be formed with optimized parameters and methods, simplifying the overall manufacturing process while achieving comprehensive light confinement.
Solution Approach 2:
The first reflection film is formed at the front end before other processing steps, preparing the light propagation path in advance. The second reflection film is then formed at the base end to prevent light leakage. This preliminary action sequence ensures that light confinement is established systematically, reducing manufacturing complexity.
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 approach effectively confines light within the columnar structures, ensuring it reaches the intended photoelectric conversion elements, thereby enhancing image quality and maintaining the panel's shape even if the moisture-proof film deteriorates.
Implementation Method 1
The reflection film is arranged to reflect light of a predetermined wavelength. the light generated in the columnar structures through radiation exposure will be propagated along the inside of the columnar structures while reflecting over the entire length of the columnar structures not only along the interfaces between the columnar structures and the reflection films
Implementation Method 2
the light generated inside each of the columnar structures through radiation exposure is caused to be propagated while being confined within the columnar structures by taking advantage of the difference between the refractive index of the columnar structures and the refractive index of the gaps (air) between the columnar structures (optical confinement effect)
Data Source
AI summary
A radiological image conversion panel, having a phosphor layer containing therein a fluorescent substance which emits light through radiation exposure, is manufactured by forming the fluorescent substance into respective columnar structures on one of surfaces of a substrate to thereby obtain a phosphor layer made up of a group of columnar structures. The panel is subsequently manufactured by forming reflection films by respectively covering an outer surface of each of the columnar structures with a reflection film while leaving a gap between respective adjoining columnar structures, the reflection film being arranged to reflect light of a predetermined wavelength. In case a refractive index of the gap is lower than a refractive index of the columnar structures, the reflection films are formed of an inorganic material having a higher refractive index than the refractive index of the columnar structures.