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A grating and radiation imaging device

A grating and grid technology, applied in the fields of gratings and radiation imaging devices, can solve the problems of high cost, inability to apply high-energy X-rays, and low forming efficiency.

Active Publication Date: 2017-10-13
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: solve the problem that the X-ray grating in the prior art is formed by chemical corrosion, the forming efficiency is low and the cost is high, and the problem that it cannot be applied to high-energy X-ray occasions

Method used

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  • A grating and radiation imaging device
  • A grating and radiation imaging device
  • A grating and radiation imaging device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] like image 3 , Figure 4 As shown, the grid unit 1 includes a first sheet 11 and a second sheet 12; the length of the second sheet 12 is shorter than the length of the first sheet 11, and at least two second sheets 12 are stacked on top of each other along the length direction of the first sheet 11. The two ends of the first sheet 11 are on the same surface, so that a grid gap is formed between adjacent first sheets 11 .

[0044] like figure 1 , Figure 3 to Figure 4 As shown, in one embodiment of the present invention, the grid unit 1 is formed using two sheets of different lengths, wherein the first sheet 11 and the second sheet 12 have different lengths, and the two second sheets 12 are stacked on top of the first sheet. At both ends of the sheet 11, two second sheets 12 are stacked on the same side of the first sheet 11. In this scheme, the thickness of the first sheet 11 can be the same as that of the second sheet 12 or can be the same as that of the second she...

Embodiment 2

[0048] like Figure 7 to Figure 9 As shown, this embodiment is basically the same as Embodiment 1, the difference is that in this embodiment, the grid unit 1 is formed by three kinds of sheets with different lengths, wherein the first sheet 11 and the second sheet 12 have different lengths, and the second sheet Three sheets 13; the length of the third sheet 13 is less than the length of the first sheet 11, and at least three second sheets 12 are stacked on the two ends and the middle of the same surface of the first sheet 11 along the length direction of the first sheet 11; the third sheet 13 stacked on the first sheet 11 between any two second sheets 12 . The length of the third sheet 13 can be determined according to the length of the gap formed by the first sheet 11 and the second sheet 12, and the length of the third sheet 13 can be the length of the gap formed by the first sheet 11 and the second sheet 12. Of course, if the first The length of the gap formed by the sheet...

Embodiment 3

[0050] Of course, it can be understood that the present invention is not limited thereto, and the present invention can also generate more gratings with different duty ratios by arranging more different slices and combining them with each other. like Figure 10 As shown, this embodiment is basically the same as Embodiment 1, the difference is that in this embodiment, four different sheets are selected for the grid unit 1, and a fourth sheet 14 is added. At least four second sheets 12 are stacked on the same surface of the first sheet 11 along the length direction of the first sheet 11 ; the third sheet 13 is stacked on the first sheet 11 between any two second sheets 12 . A fourth sheet is also stacked on the third sheet 13 . 1 first sheet 11, 4 second sheets 12, 2 third sheets 13, and 1 fourth sheet 14 together form a grid unit 1, and a plurality of stacked grid units 1 make a variety of space than the raster. It should be understood that, according to the idea of ​​formin...

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Abstract

The invention discloses a grating and a radiation imaging device, wherein the grating includes: several stacked grid units, and several grid units are stacked to form a grid; the grid unit includes two mutually parallel planes A first sheet and a second sheet; the first sheet and the second sheet are stacked along the length direction of the first sheet; the first sheet is a sheet that is not easily transparent to radiation. The invention adopts laminations of different specifications to form a grating with a uniform grating gap, and the thickness of the grating is not limited, and can be used in high-energy ray occasions.

Description

technical field [0001] The invention relates to a grating and a radiation imaging device, belonging to the technical field of radiation imaging. Background technique [0002] A grating is an instrument that measures the distance between the grating lines. According to the principle of forming Moiré fringes, it can be divided into geometric grating (amplitude grating) and diffraction grating (phase grating). Micron-level and sub-micron-level grating measurements use geometrical gratings. The grating pitch is 100 μm to 20 μm, which is much larger than the light wavelength of the light source. The diffraction phenomenon can be ignored. When the two gratings move relative to each other, a low-frequency beat phenomenon is generated to form Moiré fringes. The measurement principle is called the image principle. Nano-scale grating measurement uses a diffraction grating. At present, the grating pitch is 8 μm or 4 μm. The width of the grating line is very close to the wavelength of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21K1/06G21K4/00
CPCG21K1/025G21K2207/005G21K1/06G02B5/1838G21K2201/067
Inventor 张丽洪明志黄清萍沈乐
Owner TSINGHUA UNIV