CN111610552B - Apparatus and method for image measurement of ray emitting area - Google Patents

Abstract

The invention provides a ray emission area image measuring device and a method, wherein the ray emission area image measuring device comprises: the ray emission module, the imaging module and the image recording module are arranged in sequence; wherein, the imaging module is provided with an arc cone; the ray emitting module is used for generating rays and sending the rays to the image recording module through the arc cone according to a preset track so that the image recording module generates a measurement image according to the rays. Adopt the circular arc awl as imaging module in this application, simplified imaging module's design, processing and detection, reduced the accuracy of aiming, just, broken through the restriction of current ray emission area image detection technique field range, reduced the requirement to ray yield, improved the tolerance to emission area ray source position random displacement, simultaneously, guaranteed high spatial resolution ability, improved measurement accuracy.

Description

Apparatus and method for image measurement of ray emitting area

technical field

The invention relates to the technical field of measurement of images of radiation emission areas, in particular to an image measurement device and method of radiation emission areas.

Background technique

Radiation devices are widely used in many fields of scientific research and industrial production. Commonly used radiation devices include accelerator neutron sources, hash neutron sources, neutron tubes, reactors, synchrotron radiation devices, and radioisotope sources. The types of radiation include neutron , gamma rays, and X-rays. At present, as a new type of radiation device, a large-scale laser device has the characteristics of small size, short duration and high radiation flux. It can simultaneously generate neutrons, protons, gamma rays and X-rays, and has strong application potential. . In practical applications, in order to effectively use various radiation devices, it is necessary to understand the properties of the radiation source, including flux, energy spectrum, size and shape, etc. Therefore, for different radiation devices, a variety of image detection technologies for radiation emission areas have been developed.

For large-scale laser devices, the existing image measurement technologies for radiation emission areas mainly include penumbral imaging diagnostic technology and pinhole imaging diagnostic technology. When any one of the above-mentioned single holes is used as the imaging component, it is the imaging component of the single-hole imaging diagnosis technology. It meets the requirements of laser-driven fusion neutron emission area image measurement. In order to solve the problem of insufficient field of view of the single-hole structure, the imaging component has evolved from a single-hole structure to a multi-type porous array structure, including multiple penumbral holes or multiple pinholes, etc. Although the porous array structure can meet the needs of laser-driven fusion However, its application range is greatly limited, and it is only applicable to MJ-class laser devices with a neutron yield exceeding 1×10 ¹⁴ , resulting in the application of pinhole imaging diagnostic technology being limited by the neutron yield. limit, reducing the accuracy of the measurement.

Contents of the invention

In view of this, the object of the present invention is to provide an image measurement device and method for the ray emission area to alleviate the above problems, and adopting the arc cone as the imaging module simplifies the design, processing and detection of the imaging module and reduces the aiming accuracy. It breaks through the limitations of the field of view of the existing image detection technology in the radiation emission area, reduces the requirements for the radiation output, improves the tolerance to the random movement of the radiation source position in the emission area, and at the same time ensures high spatial resolution and improves measurement accuracy.

In the first aspect, an embodiment of the present invention provides an image measuring device for a radiation emitting area, the device comprising: a radiation emitting module, an imaging module, and an image recording module arranged in sequence; wherein, the imaging module is provided with an arc cone;

The ray emitting module is configured to generate a ray, and send the ray to the image recording module through the arc cone according to a preset trajectory, so that the image recording module generates a measurement image according to the ray.

In combination with the first aspect, the embodiment of the present invention provides a first possible implementation manner of the first aspect, wherein the preset trajectory is a path tangent to the arc cone, and the ray follows the preset trajectory The step of sending to the image recording module through the arc cone includes:

Sending the ray to the image recording module along a path tangent to the arc cone.

With reference to the first possible implementation manner of the first aspect, the embodiment of the present invention provides a second possible implementation manner of the first aspect, wherein the image recording module is configured to receive the radiation, and according to the The radiation generates a measurement image; wherein, the measurement image includes a dark area, a penumbra area and a bright area, and the dark area, the penumbra area, and the bright area are arranged outward in sequence along a radial direction.

With reference to the second possible implementation manner of the first aspect, the embodiment of the present invention provides a third possible implementation manner of the first aspect, wherein the emission area of the radiation emitting module is provided with a radiation source;

The image recording module is further configured to reconstruct the image of the radiation source according to the penumbra region, to obtain the reconstructed image of the radiation source.

With reference to the second possible implementation manner of the first aspect, the embodiment of the present invention provides a fourth possible implementation manner of the first aspect, wherein the signal strength of the dark area is set according to the thickness of the arc cone.

With reference to the second possible implementation manner of the first aspect, the embodiment of the present invention provides a fifth possible implementation manner of the first aspect, wherein the signal intensity of the bright area is set according to the yield of the ray.

In combination with the first aspect, the embodiment of the present invention provides a sixth possible implementation manner of the first aspect, wherein there is one arc cone, which is arranged between the ray emitting module and the image recording module;

Alternatively, there are two arc cones, forming an arc cone combination, and the arc cone combination is arranged between the ray emitting module and the image recording module.

With reference to the third possible implementation of the first aspect, the embodiment of the present invention provides a seventh possible implementation of the first aspect, wherein the ray source includes at least one of the following: an accelerator neutron source, a hash Neutron sources, neutron tubes, reactors, synchrotron radiation facilities, radioisotope sources and laser facilities.

With reference to the first aspect, the embodiment of the present invention provides an eighth possible implementation manner of the first aspect, wherein the rays include at least one of the following: neutrons, X-rays and gamma rays.

In the second aspect, an embodiment of the present invention also provides a method for measuring an image of a radiation emitting area, the method is applied to the above-mentioned image measuring device for a radiation emitting area, and the method includes:

Generate a ray; wherein, the ray is generated by a ray emitting module;

The ray is sent to the image recording module through the arc cone according to a preset trajectory, so that the image recording module generates a measurement image according to the ray.

Embodiments of the present invention bring the following beneficial effects:

Embodiments of the present invention provide an image measurement device and method for a radiation emission area, wherein the image measurement device for a radiation emission area includes: a radiation emission module, an imaging module, and an image recording module arranged in sequence; wherein, the imaging module is provided with an arc cone; The transmitting module is used to generate the ray, and send the ray to the image recording module through the arc cone according to the preset trajectory, so that the image recording module generates a measurement image according to the ray. In this application, the arc cone is used as the imaging module, which simplifies the design, processing and detection of the imaging module, reduces the aiming accuracy, and breaks through the limitation of the field of view of the image detection technology in the existing ray emission area, and reduces the impact on the ray. The requirement of output improves the tolerance to the random movement of the radiation source position in the emission area, at the same time, it ensures high spatial resolution and improves the measurement accuracy.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and appended drawings.

In order to make the above-mentioned objects, features and advantages of the present invention more comprehensible, preferred embodiments will be described in detail below together with the accompanying drawings.

Description of drawings

In order to more clearly illustrate the specific implementation of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the specific implementation or description of the prior art. Obviously, the accompanying drawings in the following description The drawings show some implementations of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative work.

FIG. 1 is a schematic diagram of an image measurement device for a ray emitting area provided by an embodiment of the present invention;

Fig. 2 is the schematic diagram of a kind of arc cone provided by the embodiment of the invention;

Fig. 3 is a schematic diagram of another image measurement device for a ray emitting area provided by an embodiment of the present invention;

Fig. 4 is a schematic diagram of the size of an arc cone provided by an embodiment of the present invention;

Fig. 5 is a kind of neutron point spread function figure provided by the embodiment of the present invention;

Fig. 6 is a schematic diagram of measurement results of a neutron source provided by an embodiment of the present invention;

Fig. 7 is a schematic diagram of measurement results of another neutron source provided by an embodiment of the present invention;

Fig. 8 is a flow chart of a method for measuring an image of a ray emitting area provided by an embodiment of the present invention.

icon:

10-radiation emission module; 20-imaging module; 30-image recording module.

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. the embodiment. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

For existing large-scale laser devices, a millimeter-scale target is directly or indirectly driven by laser, so that the target is continuously shrunk, and the fusion fuel gas in the target is heated, thereby achieving the conditions for the fusion reaction to occur; Emit various rays, mainly including neutrons, gamma rays and X-rays. In practical applications, high spatial resolution neutron imaging technology is usually used to obtain images of neutron source regions, so as to deduce parameters such as the position, size, shape and uniformity of neutron source regions. Due to the small size of the neutron source (about Hundreds of microns), therefore, the spatial resolution of the neutron imaging system is required to be less than ten microns. At present, the neutron imaging system applied to the measurement of laser-driven fusion neutron emission region adopts two kinds of imaging techniques, that is, penumbral imaging diagnostic technology suitable for low yield (>1×10 ¹³ ) and suitable for high yield (>1×10 13 10 ¹⁵ ) pinhole imaging diagnostic technology, and the imaging component has evolved from a single-hole structure to a multi-type porous array structure.

For a single-hole structure, its field of view is usually 200 μm, and the center position of the neutron source can vary up to 400 μm×500 μm. Therefore, the single-hole structure cannot meet the requirements of laser-driven fusion neutron emission area image measurement. In order to solve the problem of insufficient field of view of the single-hole structure, a multi-type porous array structure design is proposed. Among them, the multi-type porous array structure can measure multiple images, including pinhole images and penumbral hole images, and the image features are different. , which can be used for mutual verification and improve the accuracy of image reconstruction; and, the porous array structure can increase the field of view of the system and reduce the difficulty of aiming. However, the application range of the porous array structure is greatly limited, and it is only suitable for MJ-level laser devices with a neutron yield exceeding 1×10 ¹⁴ , which leads to the limitation of the neutron yield in the application of pinhole imaging diagnostic technology, which reduces the The accuracy of the measurement.

Based on the above problems, an embodiment of the present invention provides an image measurement device and method for a ray emission area to alleviate the above problems, and adopting an arc cone as the imaging module simplifies the design, processing and detection of the imaging module, and reduces the aiming Accuracy, breaking through the limitation of the field of view of the existing image detection technology in the radiation emission area, reducing the requirements for the radiation output, improving the tolerance to the random movement of the radiation source position in the emission area, and at the same time, ensuring high spatial resolution , improving the measurement accuracy.

In order to facilitate the understanding of this embodiment, a detailed description of an image measurement device for a radiation emission area provided by an embodiment of the present invention is firstly introduced below.

Embodiment one:

An embodiment of the present invention provides an image measuring device for a ray emitting area. Fig. 1 is a schematic diagram of an image measuring device for a ray emitting area provided by an embodiment of the present invention. As shown in Fig. 1 , the device includes: sequentially arranged ray emitting The module 10, the imaging module 20 and the image recording module 30; wherein, the imaging module 20 is provided with an arc cone.

Wherein, the ray emitting module 10 is used to generate the ray, and send the ray to the image recording module 30 through the arc cone according to a preset trajectory, so that the image recording module 30 generates a measurement image according to the ray. Here, the imaging module 20 adopts an arc cone, which simplifies the design, processing and detection of the imaging module and reduces the aiming accuracy compared with the existing single hole structure and multi-type porous array structure. In addition, the ray point spread function of the imaging module 20 depends on the radius of the circular arc cone, thereby breaking through the limitation of the field of view of the existing image detection technology in the ray emission area, and reducing the requirement on the ray output.

The image measurement device for the ray emission area provided by the embodiment of the present invention includes: a ray emission module, an imaging module, and an image recording module arranged in sequence; wherein, the imaging module is provided with an arc cone; the ray emission module is used to generate rays, and Send to the image recording module through the arc cone according to the preset trajectory, so that the image recording module generates a measurement image according to the ray. In this application, the arc cone is used as the imaging module, which simplifies the design, processing and detection of the imaging module, reduces the aiming accuracy, and breaks through the limitation of the field of view of the image detection technology in the existing ray emission area, and reduces the impact on the ray. The requirement of output improves the tolerance to the random movement of the radiation source position in the emission area, at the same time, it ensures high spatial resolution and improves the measurement accuracy.

In practical application, the above-mentioned arc cone is a shuttle-shaped structure, as shown in Figure 2, the arc cone is an axisymmetric structure, the upper and lower arcs of the section along the axis are arcs with the same radius, the section perpendicular to the axis is circular, and its radius Determined by the arc radius and arc spacing on the section along the axis. In addition, the arc cone is bounded by the maximum section of the vertical axis, the left part and the right part of the arc cone can be asymmetrical, that is, the length and end surface size of the left part and the right part can be different; or, the maximum cross section of the vertical axis is circle, the arc radius of the left part and the right part can also be different; perhaps, the arc can be replaced by other arc structures, such as elliptical arc and any quadratic curve, etc., therefore, for the specific shape of the arc cone, the present invention implements Examples are not limited to this.

In addition, in practical applications, the above-mentioned arc cone may be one, and at this time, the arc cone is arranged between the ray emitting module 10 and the image recording module 30; or, the above-mentioned arc cone is two, forming an arc cone Combination, the arc cone combination is arranged between the ray emission module 10 and the image recording module 30, so that by changing the relative positional relationship between each arc cone in the arc cone combination, the rays in a larger spatial range can be preset The track is sent to the image recording module 30 through the arc cone, which expands the field of view and further improves the spatial resolution. Therefore, the embodiment of the present invention does not limit the number of arc cones here.

Wherein, the above-mentioned preset trajectory is a path tangent to the arc cone, and the emission area of the ray emitting module 10 is provided with a ray source; the rays emitted by the ray source are sent to the image recording module 30 according to the path tangent to the arc cone, so that Make the image recording module 30 generate a measurement image according to the radiation. In addition, the above-mentioned preset trajectory may also be a path near the point of tangency to the arc cone. In this case, the rays emitted by the ray source are sent to the image recording module 30 along the path near the point of tangency to the arc cone. Wherein, the ray source includes at least one of the following: accelerator neutron source, hash neutron source, neutron tube, reactor, synchrotron radiation device, radioisotope source and laser device, and the ray includes at least one of the following: neutron, X-ray and gamma rays. Here the image recording module 30 can be a neutron image detection system, which consists of a neutron image detection unit, a visible light collection unit, a visible light signal amplification unit and a visible light image recording unit, wherein the neutron image detection unit can be a flat scintillator, or It is a capillary array scintillator, the visible light collection unit can be a lens combination, it can also be a fiber optic light cone, or it can be an image beam, the visible light signal amplification unit is an image intensifier, and the visible light image recording unit can be a visible light CCD (Charge-coupled Device, charge-coupled device), or other devices that generate measurement images based on radiation, and the specific shape of the image recording module 30 is not limited in this embodiment of the present invention.

For ease of understanding, here, the neutron emitted by the accelerator neutron source is used as an example to illustrate, as shown in Figure 3, the neutron emitted by the neutron source is sent to the image recording module 30 along a path tangent to the arc cone, where The sub-source is an accelerator neutron source or a hash neutron source, and the image recording module 30 generates a measurement image according to the received neutrons. Wherein, as shown in FIG. 3 , the measurement image includes a dark area, a penumbra area and a bright area, and the dark area, the penumbra area and the bright area are arranged outwards in sequence along the radial direction. Among them, the center of the measurement image is the dark area, and the signal strength of the dark area is set according to the thickness of the arc cone. Here, the signal in the dark area is the background signal of the measurement image, and the background signal here is the background signal, that is, it does not contain any emission area. The signal of any image information of the emission source in the medium; the outermost periphery of the measurement image is the bright area, and the signal intensity of the bright area is set according to the neutron yield, that is, the signal intensity of the bright area is only related to the neutron yield (quantity) ; Between the dark area and the bright area, it is a penumbra area, where the penumbra area contains all information of the accelerator neutron source in the emission area, and at this time, the image recording module 30 is also used to reconstruct the neutrons according to the penumbra area. source image, resulting in a reconstructed image of the neutron source.

In addition, the ray point spread function of the imaging module 20 composed of the arc cone also depends on the arc radian of the arc cone, that is, the radius of the circle, wherein the ray point spread function is the ray flux space formed after the ray passes through the imaging module 20 distributed. At this time, for the radius of the selected arc cone, if the position of the ray source is changed, the ray can still be tangent to the arc cone, and the shape of the point spread function of the ray remains basically unchanged. At this time, the ray source satisfying the above conditions The change range of the spatial position of the imaging system is the field of view of the imaging system, so that by selecting the appropriate radius of the arc cone, the rays emitted in a larger range are all tangent to the arc cone, breaking through the existing ray emission area The limitation of the field of view of the image detection technology reduces the requirements for the radiation yield and improves the tolerance to the random movement of the radiation source in the emission area; and ensures that the radiation point spread function has good sharpness, that is, high spatial resolution , the image detection technology of the ray emission area with large field of view and high spatial resolution can be established.

The above-mentioned image measurement device for the radiation emission area can also be applied to the laser device in addition to the neutron source. For a radiation source with a larger size, correspondingly, the size of the arc cone needs to be enlarged in proportion, so that the field of view is also correspondingly It increases proportionally, but for a ray source with a very large size, the spatial resolution of the measurement image will deteriorate. In addition, for neutron sources, it is necessary to choose heavy metal materials with short neutron free paths, and the neutron free paths are directly related to neutron energy. Therefore, the material of the arc cone should be selected according to the neutron energy, such as for For the 14MeV neutrons emitted by the deuterium-tritium fusion reaction, tungsten and gold should be used for the arc cone at this time.

In addition, when the rays are X-rays, the measurement principle is the same as that of the above-mentioned neutrons. It should be noted that since the penetration of X-rays is weaker than that of neutrons, a smaller size should be selected at this time. The arc cone, and the material of the arc cone should be set according to the energy of X-rays, such as copper, titanium, tantalum and other materials can be used. In practical applications, the specific arc cone material should be based on the energy emitted by the ray source The energy of the radiation is set, which is not limited in the embodiment of the present invention.

Therefore, in this application, by using the arc cone as the imaging module, since the ray point spread function depends on the arc radian, that is, the radius of the circle, by selecting the appropriate arc cone size, including arc, length and end face diameter, etc., it can be realized in If the position of the ray source is changed arbitrarily in the area of 100 microns, the ray emitted by the ray emitting module can still be tangent to the arc, that is, the shape of the point spread function of the ray remains basically unchanged, which is different from the existing single-structure imaging module limited to 0-200 μm In terms of the field of view, the arc cone has a larger field of view; and, since the spatial resolution is determined by the half-width of the point spread function of the ray, the larger the radius of the arc cone, the better the spatial resolution. High, so as to ensure high spatial resolution and improve measurement accuracy, at the same time, it breaks through the limitation of the field of view of the existing image detection technology in the radiation emission area, reduces the requirements for the output of radiation, and improves the requirements for radiation in the emission area. Tolerance for random movement of the source position.

For ease of understanding, an example is given here. As shown in Figure 3, the image measurement device for the ray emission area, wherein the neutron source is located at the center of the field of view, and Figure 4 is a schematic diagram of the size of the arc cone, when the neutron source deviates from the center of the field of view by 0.5mm, the result shown in Figure 5 For the neutron point spread function shown in Figure 5, a sharp edge is formed on the edge of the circular arc cone, and its half width is about 5±1 μm, and the shape of the edge does not change significantly, that is, the neutron source deviates from the center of the field of view by 0.5 mm, the neutron point spread function does not change significantly, the imaging field of view is not less than 1mm, and the spatial resolution can reach 5μm.

In addition, for two neutron sources with a distance of 20 μm and a size of about 5 μm that are 0.3 mm away from the center of the field of view, the measurement image and reconstruction image of the neutron source can be obtained through the image recording module, as shown in Figure 6, where 6 -a is the point spread function image of the neutron source, 6-b is the noise-free measurement image of the neutron source, 6-c is the source image of the neutron source, 6-d is the noisy measurement of the neutron source before filtering Image, 6-e is the filtered noisy measurement image of the neutron source, 6-f is the reconstructed image of the neutron source. According to 6-c and 6-f, the reconstructed image of the neutron source is similar to the source image, achieving a spatial resolution of no more than 5 μm, and the spacing is still maintained at 20 μm.

When the diameter of the neutron source is about 40 μm and deviates from the center of the field of view by 0.3 mm, at this time, the measurement image and reconstruction image of the neutron source can be obtained through the image recording module, as shown in Figure 7, where 7-a is the center The point spread function image of the sub-source, 7-b is the noise-free measurement image of the neutron source, 7-c is the source image of the neutron source, 7-d is the noisy measurement image of the neutron source before filtering, 7- e is the filtered noisy measurement image of the neutron source, 7-f is the reconstructed image of the neutron source. According to 7-c and 7-f, it can be seen that the reconstructed image of the neutron source is close to the source image without obvious distortion, thus improving the measurement accuracy while ensuring high spatial resolution.

On the basis of the above-mentioned embodiments, an embodiment of the present invention also provides a method for measuring an image of a ray-emitting area, which is applied to the above-mentioned image measuring device for a ray-emitting area, as shown in FIG. 8 , the method includes the following steps:

Step S802, generating a ray; wherein, the ray is generated by a ray emitting module;

Step S804, sending the ray to the image recording module through the arc cone according to the preset trajectory, so that the image recording module generates a measurement image according to the ray.

In the image measurement method of the ray emitting area provided by the embodiment of the present invention, the ray is first generated by the ray emitting module, and the ray is sent to the image recording module through the arc cone according to the preset trajectory, so that the image recording module generates a measurement image according to the ray. Therefore, the arc cone is used as the imaging module in this application, which simplifies the design, processing and detection of the imaging module, reduces the aiming accuracy, and breaks through the limitation of the field of view of the existing ray emission area image detection technology, reduces the The requirements for the radiation output increase the tolerance to the random movement of the radiation source in the emission area, and at the same time, ensure the high spatial resolution and improve the measurement accuracy.

An embodiment of the present invention also provides an electronic device, including a memory, a processor, and a computer program stored on the memory and operable on the processor. When the processor executes the computer program, the image measurement method for the ray emission area provided by the above embodiment is implemented. A step of.

An embodiment of the present invention also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is run by a processor, the steps of the method for measuring the image of the ray-emitting area of the above-mentioned embodiment are executed.

The computer program product provided by the embodiments of the present invention includes a computer-readable storage medium storing program codes. The instructions included in the program codes can be used to execute the methods described in the foregoing method embodiments. For specific implementation, please refer to the method embodiments. , which will not be repeated here.

Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working process of the above-described system and device can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

In addition, in the description of the embodiments of the present invention, unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

If the functions are realized in the form of software function units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium executable by a processor. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes. .

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation. construction and operation, therefore, should not be construed as limiting the invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

Finally, it should be noted that: the above-described embodiments are only specific implementations of the present invention, used to illustrate the technical solutions of the present invention, rather than limiting them, and the scope of protection of the present invention is not limited thereto, although referring to the foregoing The embodiment has described the present invention in detail, and those skilled in the art should understand that any person familiar with the technical field can still modify the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention Changes can be easily thought of, or equivalent replacements are made to some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the scope of the present invention within the scope of protection. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (10)

1. An image measuring device for a ray emitting area, characterized in that the device comprises: a ray emitting module, an imaging module and an image recording module arranged in sequence; wherein the imaging module is provided with an arc cone; The ray emitting module is configured to generate a ray, and send the ray to the image recording module through the arc cone according to a preset trajectory, so that the image recording module generates a measurement image according to the ray; Wherein, the ray point spread function of the imaging module depends on the radius of the arc cone, for the selected radius of the arc cone, if the position of the ray source is changed, the ray can still be similar to the arc cone , the shape of the ray point spread function remains unchanged, wherein the ray point spread function is the spatial distribution of the ray flux formed after the ray passes through the imaging module. 2. The image measurement device for the ray emitting area according to claim 1, wherein the preset trajectory is a path tangent to the arc cone, and the ray passes through the arc according to the preset trajectory The steps of sending the cone to the image recording module include: Sending the ray to the image recording module along a path tangent to the arc cone. 3. The image measurement device for the ray emitting area according to claim 2, wherein the image recording module is configured to receive the ray and generate a measurement image according to the ray; wherein the measurement image includes dark area, a penumbra area, and a bright area, and the dark area, the penumbra area, and the bright area are set outward in sequence along the radial direction. 4. The image measuring device for the radiation emitting area according to claim 3, wherein the radiation area of the radiation emitting module is provided with a radiation source; The image recording module is further configured to reconstruct the image of the radiation source according to the penumbra region, to obtain the reconstructed image of the radiation source. 5 . The image measuring device for the ray emission area according to claim 3 , wherein the signal strength of the dark area is set according to the thickness of the arc cone. 6 . 6 . The image measuring device for the radiation emitting area according to claim 3 , wherein the signal strength of the bright area is set according to the yield of the radiation. 7 . 7. The image measurement device for the ray emitting area according to claim 1, wherein there is one arc cone, which is arranged between the ray emitting module and the image recording module; Alternatively, there are two arc cones, forming an arc cone combination, and the arc cone combination is arranged between the ray emitting module and the image recording module. 8. The image measurement device for the ray emission area according to claim 4, wherein the ray source comprises at least one of the following: an accelerator neutron source, a hash neutron source, a neutron tube, a reactor, and a synchrotron radiation device , radioisotope sources and laser devices. 9. The image measuring device for a radiation emission area according to claim 1, wherein the radiation comprises at least one of the following: neutrons, X-rays and gamma rays. 10. A method for measuring an image of a radiation emitting area, characterized in that it is applied to the image measuring device for a radiation emitting area according to any one of claims 1-9 above, the method comprising: Generate a ray; wherein, the ray is generated by a ray emitting module; sending the ray to the image recording module through an arc cone according to a preset trajectory, so that the image recording module generates a measurement image according to the ray; Wherein, the ray point spread function of the imaging module depends on the radius of the arc cone, for the selected radius of the arc cone, if the position of the ray source is changed, the ray can still be similar to the arc cone , the shape of the ray point spread function remains unchanged, wherein the ray point spread function is the spatial distribution of the ray flux formed after the ray passes through the imaging module.

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