Imaging Unit Slit Scintillator Mirror Placement
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Solution Overview
Problem
Existing radiation image acquisition systems face challenges in preventing image blurring due to enlargement factor changes during object conveyance and suffer from the influence of mirrors on X-ray absorption, which affects sensitivity and clarity of radiation images.
Innovation Solution
An imaging unit with a slit and a scintillator positioned to receive radiation, where mirrors reflect scintillation light in the normal direction to a line scan camera, ensuring the input surface is parallel to both conveying and line directions, and the mirror is placed outside the irradiation region to avoid X-ray absorption, allowing for high sensitivity and clarity imaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If mirrors are installed to face the input surface to capture scintillation light, then image capturing capability is improved, but X-ray absorption by mirrors increases, reducing radiation image sensitivity
Solution Approach 1:
The patent extracts the mirror from the harmful irradiation region (X-ray path) while keeping it in the useful optical path (scintillation light path). The mirror is positioned to reflect scintillation light from the input surface without being exposed to X-rays, thereby eliminating X-ray absorption while maintaining image capturing capability.
Solution Approach 2:
The patent introduces the concept of separating the X-ray irradiation path from the scintillation light detection path. By positioning the mirror only in the optical path and not in the X-ray path, the system uses spatial separation as an intermediary solution to avoid the harmful interaction between mirrors and X-rays.
2Productivity
If a conveying apparatus is used to convey objects, then imaging speed is improved, but enlargement factor changes at different portions causing image blurring
Solution Approach 1:
The patent employs a line scan camera that dynamically synchronizes its scanning speed with the conveying speed of the object. This dynamic adjustment ensures that the enlargement factor remains consistent across different portions of the conveyed object, preventing image blurring while maintaining high imaging speed.
Solution Approach 2:
The system changes the scanning parameters of the line scan camera to match the conveying speed of the object. By adjusting the scanning speed parameter dynamically, the system maintains a constant enlargement factor across the entire object, thereby achieving both high speed imaging and clear images without blurring.
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 effectively prevents image blurring and enhances radiation image clarity and sensitivity by maintaining a consistent enlargement factor and eliminating mirror interference, enabling efficient detection of materials with low-energy radiation.
Implementation Method 1
cause a scintillator to convert X-rays transmitted through the object into scintillation light
Implementation Method 2
one or a plurality of mirrors that are installed in the housing and reflect scintillation light output from the input surface
Data Source
AI summary
An imaging unit includes a housing having a wall portion in which a slit for passing radiation is formed, a scintillator having an input surface to which radiation passing through the slit is input, a first mirror that reflects scintillation light output from the input surface, and a line scan camera that detects scintillation light reflected by the first mirror. The scintillator is placed to make the input surface parallel to both the conveying direction and a line direction. The first mirror is positioned outside an irradiation region connecting the peripheral edge of the slit to the input surface of the scintillator.