Radiographic Imaging Device Using Refraction-Enhancing Grating
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Solution Overview
Problem
Conventional Talbot interferometers face challenges in increasing sensitivity for phase imaging without upsizing the device or reducing the grating period, which affects the detection of subtle refraction angles in X-ray phase imaging.
Innovation Solution
A radiographic imaging device with a grating section comprising a G1 grating and a refraction-enhancing grating, where the refraction-enhancing grating is placed at radiation converging points to enhance refraction, allowing for increased sensitivity without altering the device size or grating period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the device size is increased to enhance sensitivity for detecting subtle refraction angles, then the sensitivity of phase imaging is improved, but the device becomes larger and less practical for laboratory use
Solution Approach 1:
The patent changes the optical parameters of the imaging system by introducing a refraction-enhancing grating with specific geometric features (tilted lines, varying spacing) that modify how radiation refracts through the sample. This allows sensitivity enhancement through parameter optimization rather than physical scaling
Solution Approach 2:
The refraction-enhancing grating acts as an intermediary component between the sample and the detector. It mediates the refraction effect by providing a structured pattern that amplifies subtle refraction angles through moiré fringe formation, enabling high sensitivity without increasing device dimensions
2Measurement precision
If the grating period is reduced to increase sensitivity, then the measurement precision is improved, but the manufacturing complexity and difficulty increase
Solution Approach 1:
Instead of reducing the grating period, the patent changes other parameters of the refraction-enhancing grating, such as the tilt angle of the lines and the spacing pattern. These parameter changes achieve sensitivity enhancement while maintaining manufacturable grating dimensions
Solution Approach 2:
The refraction-enhancing grating employs local variations in line spacing and orientation to create regions of enhanced refraction sensitivity. This local quality approach allows sensitivity improvement in specific measurement zones without requiring the entire grating to have ultra-fine features
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 enhances the sensitivity of X-ray phase imaging by increasing the refraction angle detection, enabling highly sensitive imaging without the need for device enlargement or grating period reduction.
Implementation Method 1
The G1 grating has a G1 periodic structure for forming radiation converging points between the G1 grating and the detector
Implementation Method 2
the refraction-enhancing grating is placed at the radiation converging points and has an enhancement plane that enhances the refraction
Implementation Method 3
The detector is configured to acquire images of the radiation that has passed through the grating section
Data Source
AI summary
A high-sensitive phase imaging is achieved using a grating section without upsizing the imaging device or narrowing the period of the gratings. A radiation source generates radiation on a radiation path toward the grating section. The grating section comprises a G1 grating and a refraction-enhancing grating. The G1 grating has a G1 periodic structure that forms radiation converging points where an intensity of the radiation is increased between the G1 grating and a detector. The refraction-enhancing grating is located at the position of the radiation converging points and has enhancement planes and that increase the refraction angle of the radiation. The detector detects the radiation that has passed through the grating section.