Stacked Sheet Grating Structure for High-Energy X-Ray Imaging
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Solution Overview
Problem
Existing methods for manufacturing gratings, such as mechanical ruling, laser holographic lithography, and electron beam lithography, face challenges with low efficiency, high cost, and limited precision, particularly when used with high-energy X-rays.
Innovation Solution
A grating is formed by stacking sheets with different specifications, including impervious and pervious materials, such as tungsten alloy sheets, to create uniform slits that allow for use with high-energy radiations, overcoming thickness limitations and enhancing toughness and strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If chemical corrosion method is used to form grating, then grating can be formed, but forming efficiency is low and cost is high
Solution Approach 1:
The patent replaces chemical corrosion methods with a physical stacking method using multiple sheets. Instead of using chemical reagents to etch gratings (chemical process), the invention stacks multiple sheets with different specifications to form the grating structure directly (physical process), thereby eliminating chemical corrosion entirely and achieving both high efficiency and low cost.
Solution Approach 2:
The patent divides the grating into multiple separate sheets that are stacked together. Each sheet can be independently manufactured and then stacked to form the complete grating structure. This segmentation allows for parallel manufacturing of individual sheets, significantly improving production efficiency while reducing costs compared to forming the entire grating through a single chemical corrosion process.
2Manufacturing precision
If existing grating manufacturing methods are used, then gratings can be formed, but precision is limited and thickness is constrained
Solution Approach 1:
The patent transitions from forming gratings in a single layer (2D plane) to stacking multiple sheets in the thickness direction (3D structure). By adding the thickness dimension, the invention overcomes the limitation of single-layer grating thickness and enables the formation of gratings with various thicknesses by simply stacking different numbers of sheets, thereby improving manufacturing precision without increasing device complexity.
3Manufacturing precision
If mechanical ruling is used, then gratings can be formed, but processing time is long and precision is low
Solution Approach 1:
The patent performs preliminary actions by pre-manufacturing multiple sheets with specific specifications before assembling the final grating. Each sheet can be prepared in advance using simple, fast processes, and then stacked to form the complete grating. This preliminary preparation of individual sheets eliminates the need for time-consuming mechanical ruling of the entire grating structure, significantly reducing processing time while maintaining high precision through controlled sheet stacking.
Data Source
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AI summary
The disclosure relates to a grating and a radiation imaging device. The grating comprises a plurality of stacked grating elements (1). The grating elements (1) are stacked to form a grid. The grating element (1) comprises a first sheet (11, 21) and a second sheet (12, 22) having two parallel planes. The second sheet (12, 22) is stacked at the first sheet (11, 21) in a length direction of the first sheet (11, 21). The first sheet (11, 21) is almost impervious to radiation. The present disclosure stacks the sheets having different specifications together to form the grating with uniform grating slits, such that there is no limitation on the thickness of the grating and the grating can be used along with high-energy radiations.