Line Camera Scintillator Panel with Radiation-Resistant Binder
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Solution Overview
Problem
Existing radiation detectors used in industrial in-line inspections experience reduced brightness due to deterioration caused by continuous X-ray irradiation, particularly due to the binder resin in the scintillator layer, leading to decreased performance over time.
Innovation Solution
A line camera with a scintillator panel containing gadolinium oxysulfide phosphors and a binder resin with a π-conjugated structure composed of seven or more atoms, having a specific general formula and a glass transition temperature between 30 to 430°C, which prevents discoloration and maintains brightness under high-dose irradiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If continuous X-ray irradiation is used for in-line inspection, then inspection efficiency is improved, but brightness deteriorates due to binder resin deterioration
Solution Approach 1:
The patent changes the chemical structure parameters of the binder resin by specifying a π-conjugated structure with 7 or more atoms. This structural parameter change enables the binder resin to resist radiation-induced deterioration while maintaining its binding function, thus preserving brightness during continuous irradiation operations.
Solution Approach 2:
The patent creates a composite scintillator layer combining phosphors (gadolinium oxysulfide) with a specifically structured binder resin. This composite material structure leverages the high light output of the phosphors while the specialized binder resin provides radiation resistance, solving the contradiction between continuous operation and brightness maintenance.
2Ease of manufacture
If conventional binder resin is used in scintillator layer, then ease of manufacture is improved, but radiation resistance deteriorates under high-dose irradiation
Solution Approach 1:
The patent modifies the molecular structure parameters of the binder resin by requiring a π-conjugated structure with 7 or more atoms. This parameter change enhances radiation resistance while the binder resin remains processable using conventional manufacturing techniques, thus maintaining ease of manufacture.
Solution Approach 2:
The patent applies local quality by specifying particular structural characteristics (π-conjugated structure with 7+ atoms) for the binder resin molecules. This localized structural enhancement provides radiation resistance at the molecular level while the overall material maintains its manufacturability and binding properties.
3Productivity
If scintillator panel is used for extended period, then productivity is improved, but brightness decreases due to deterioration
Solution Approach 1:
The patent employs partial action by using only the necessary amount of specifically structured binder resin (7 or more atoms in π-conjugated structure) to provide sufficient radiation resistance. This prevents excessive binder resin from causing other issues while maintaining brightness stability during extended operation.
Solution Approach 2:
The patent applies preliminary action by pre-structuring the binder resin with a π-conjugated structure containing 7 or more atoms before the scintillator panel is put into service. This preliminary structural configuration provides inherent radiation resistance that prevents brightness deterioration during extended operational periods.
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 solution results in a line camera with higher brightness and improved radiation resistance, reducing optical attenuation and extending the lifespan of the scintillator panel.
Implementation Method 1
Indirect conversion FPDs use scintillator panels to convert X-rays into visible light. Scintillator panels have a scintillator layer containing phosphors such as gadolinium oxysulfide (GOS), and the phosphors emit light in response to X-ray radiation.
Implementation Method 2
Light emitted from a scintillator panel is converted into electrical signals by using a sensor (photoelectric conversion layer) having a thin-film transistor (TFT) or a charge coupled device (CCD) to convert information as X-rays into digital information images.
Data Source
Figure 1~2
AI summary
Provided is a scintillator panel with reduced deterioration in brightness due to irradiation and higher brightness. A scintillator panel including a substrate and a scintillator layer containing phosphors, in which the scintillator layer includes a binder resin having a π-conjugated structure composed of seven or more atoms; in which the glass transition temperature of the binder resin is from 30 to 430°C; and the thickness of the scintillator layer is from 50 to 800 µm.