Scintillator Panel Curved Reflective Layer for Brighter Sharp Images
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Solution Overview
Problem
Conventional scintillator panels face issues with brightness due to the scattering of emitted light and insufficient phosphor filling caused by barrier ribs, leading to reduced image sharpness and brightness.
Innovation Solution
A scintillator panel design with a grid-like barrier rib and a reflective layer that includes a curved portion surrounding the phosphor layer, along with parallel surfaces, in a specific ratio, to enhance light collection and increase phosphor filling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If barrier ribs are used to suppress light scattering, then image sharpness is improved, but the amount of phosphor decreases leading to deterioration of brightness
Solution Approach 1:
The scintillator panel is divided into multiple cells by barrier ribs, which segment the phosphor layer into discrete regions. This segmentation suppresses light scattering while maintaining adequate phosphor quantity in each cell, resolving the contradiction between image sharpness and brightness.
Solution Approach 2:
The barrier ribs are strategically positioned at specific locations within the scintillator panel to divide it into cells. This local structural modification suppresses light scattering in critical regions while preserving phosphor filling in other areas, achieving both sharpness and brightness.
2Illumination intensity
If the phosphor layer is surrounded with a reflective surface having a light-collecting shape, then light collection is improved, but the barrier ribs require no parallel surfaces resulting in small amount of phosphor
Solution Approach 1:
The reflective layer is designed with a curved surface having a light-collecting shape (hemispherical or aspherical) that surrounds the phosphor layer. This curvature focuses and directs emitted light toward the detector, enhancing brightness while the barrier ribs maintain adequate phosphor filling.
Solution Approach 2:
The reflective layer is integrated with the barrier rib structure, combining the light-collecting function of the curved surface with the light-blocking function of the barrier ribs. This merged structure achieves both brightness enhancement and adequate phosphor quantity.
3Quantity of substance
If barrier ribs with high aspect ratio are used, then the amount of phosphor to be filled into cells is increased, but the emitted light does not efficiently travel to detector due to reflection by reflective layer
Solution Approach 1:
The reflective layer is designed with a curved surface (hemispherical or aspherical) that surrounds the phosphor layer, creating a light-collecting shape. This curvature enables emitted light to efficiently travel to the detector by reducing unwanted reflection, thereby maintaining brightness while using barrier ribs with high aspect ratio to increase phosphor quantity.
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
Improves brightness and image sharpness by efficiently guiding emitted light to the detector while increasing the amount of phosphor, thus enhancing the overall performance of the scintillator panel.
Implementation Method 1
a reflective layer surrounding the side and the bottom of the phosphor layer
Implementation Method 2
a scintillator panel is used for converting radiation into visible light. The scintillator panel includes radiosensitive phosphors and the radiosensitive phosphors emit visible light in response to applied radiation
Data Source
AI summary
Disclosed is a scintillator panel comprising a substrate, a grid-like barrier rib formed on the substrate, a phosphor layer in cells divided by the barrier rib, and a reflective layer surrounding the side and the bottom of the phosphor layer, the scintillator panel comprising a part where the reflective layer surrounding the side of the phosphor layer is curved and a part where opposing surfaces of the reflective layer at the side of the phosphor layer are approximately parallel, wherein a ratio in a width direction of a part where the reflective layer at the bottom of the phosphor layer is curved to a part where the reflective layer at the bottom of the phosphor layer is flat is 10.0:0 to 1.0:9.0. The brightness of the scintillator panel is improved.