CN110837200A - Variable magnification X-ray high-speed imaging device - Google Patents

Abstract

The invention discloses a variable magnification X-ray high-speed imaging device, comprising a scintillator for converting X-rays into fluorescence, a first beam splitter and a second beam splitter are respectively arranged on both sides of the scintillator, and the scintillator is arranged on both sides of the scintillator. A low-magnification lens group and a low-magnification gated camera are sequentially arranged on the exit light path of the fluorescence passing through the first beam splitter to form a low-magnification imaging channel, and a high-magnification lens group and a high-magnification gate are sequentially arranged on the exit light path of the fluorescence passing through the second beam splitter. The high-power lens group has a larger magnification than the low-power lens group; the low-power gated camera and the high-power gated camera are both connected to the timing pulse generator. The present invention has the beneficial effects that it not only satisfies the requirement of changing the magnification of the photographing device, but also can record X-ray image information at different times, thereby realizing high-speed photographic imaging.

Description

Variable magnification X-ray high-speed imaging device

technical field

The invention relates to a high-speed imaging device, in particular to a variable-magnification X-ray high-speed imaging device.

Background technique

In the process of dynamic X-ray high-speed photography, since the volume of the object changes at any time under the dynamic process, the magnification of the imaging device also needs to be adjusted accordingly.

For example: in the process of electric explosion measurement, the plasma volume generated by the electric explosion is small at the initial moment, and needs to be observed with a higher magnification. At the end of the electric explosion, the volume of the plasma increases rapidly due to expansion. , it is necessary to use a smaller magnification for observation to obtain an image of the overall morphology of the plasma during the electrical explosion. Obviously, it is difficult for the existing X-ray imaging device to meet the variable magnification imaging requirements in the dynamic measurement process.

SUMMARY OF THE INVENTION

In view of this, the present invention provides a variable magnification X-ray high-speed imaging device, which can record X-ray image information at different times to realize high-speed imaging.

For achieving the above object, the technical scheme of the present invention is as follows:

A variable magnification X-ray high-speed imaging device, the key of which is that it includes a scintillator for converting X-rays into fluorescence, and a first beam splitter and a second beam splitter are respectively arranged on both sides of the scintillator. A low-magnification lens group and a low-magnification gated camera are sequentially arranged on the exit light path of the fluorescence passing through the first beam splitter to form a low-magnification imaging channel, and a high-magnification lens group and a high-magnification gate are sequentially arranged on the exit light path of the fluorescence passing through the second beam splitter. controlling the camera to form a high-magnification imaging channel, and the magnification of the high-power lens group is greater than that of the low-power lens group;

Both the low magnification gated camera and the high magnification gated camera are connected to the timing pulse generator.

With the above structure, X-rays are irradiated on the scintillator, the scintillator converts the X-rays into fluorescence emission, and the emitted fluorescence is reflected by the first beam splitter and the second beam splitter to form two imaging and recording channels, namely the low-magnification imaging channel and the second beam splitter. The high-power imaging channel, the low-power lens group and the high-power lens group have different magnifications, and the timing pulse generator can generate electrical pulses at different time intervals to trigger the work of the low-power gated camera and the high-power gated camera, which not only satisfies the requirements of zooming. requirements, and can record X-ray image information at different times, so as to achieve high-speed photographic imaging.

Preferably, a first beam splitting prism is arranged between the high-power lens group and the high-power gated camera, and the number of high-power gated cameras is two. With the above structure, in the high magnification imaging channel, the timing pulse generator can generate trigger pulses to control the two high magnification gated cameras to record images at different times.

Preferably, a second beam splitting prism is arranged between the low-power lens group and the low-power gated camera, and the number of low-power gated cameras is two. With the above structure, in the low-magnification imaging channel, the timing pulse generator can generate trigger pulses to control the two low-magnification gated cameras to record images at different times.

Preferably, a reflection mirror is provided on the optical path of the low-power imaging channel, which is located between the low-power lens group and the second beam splitting prism. With the above structure, the light path of the low-magnification imaging channel can be reflected by 90°, so that components such as a low-magnification gated camera can be arranged in the photographing device, so that the structure of the photographing device is more compact.

Preferably, the first beam splitter and the second beam splitter are both beam splitters. With the above structure, the spectroscopic plate has a smaller thickness and absorbs less X-rays.

Preferably, the low magnification gated camera and the high magnification gated camera are placed in a direction perpendicular to the incident direction of X-rays. By adopting the above structure, the camera can be prevented from being directly irradiated by X-rays, and the interference of X-ray radiation on the camera can be reduced.

Compared with the prior art, the beneficial effects of the present invention are:

Using the variable magnification X-ray high-speed imaging device provided by the present invention not only satisfies the requirement of zooming of the imaging device, but also can record X-ray image information at different times, thereby realizing high-speed imaging.

Description of drawings

FIG. 1 is a schematic structural diagram of the present invention.

Detailed ways

The present invention will be further described below with reference to the embodiments and the accompanying drawings.

As shown in FIG. 1 , a variable magnification X-ray high-speed imaging device has a structure including a scintillator 2 and a first beam splitter 1 and a second beam splitter 3 symmetrically arranged on both sides of the scintillator 2. X-rays are irradiated to the scintillator. 2, the scintillator 2 converts X-rays into fluorescence emission, and the emitted fluorescence is reflected by the first beam splitter 1 and the second beam splitter 3 to form two imaging and recording channels, namely a low-magnification imaging channel and a high-magnification imaging channel.

The optical path of the low-power imaging channel is sequentially provided with a low-power lens group 6, a reflector 4, a second beam splitting prism 8, and two low-power gated cameras 12, and the optical path of the high-power imaging channel is sequentially provided with a high-power lens group 5, No. A beam splitting prism 7 , two high-power gated cameras 10 , two low-power gated cameras 12 and two high-power gated cameras 10 are jointly connected to a timing pulse generator 9 .

After the X-ray is converted into visible light by the scintillator 2, the low-power lens group 6 and the high-power lens group 5 with different magnifications in the channel are respectively magnified, and then four gated cameras are used to record images at different times, realizing the dynamic process. High-speed imaging of variable magnification X-rays in measurement. The low-power lens group 6 and the high-power lens group 5 are respectively located in front of and behind the scintillator 2, collect the image signals converted by X-rays, and enter different gated cameras after being split by the first beam splitting prism 7 and the second beam splitting prism 8. The pulse generator 9 generates electrical pulses with time intervals to trigger the operation of each gated camera, so as to record the X-ray image information at different times and realize high-speed photographic imaging.

Therefore, in this embodiment, by installing lens groups with different magnifications in the low-magnification imaging channel and the high-magnification imaging channel, the photographing device has different magnifications. At the same time, beam splitting prisms are set on both the low-magnification imaging channel and the high-magnification imaging channel, and the optical beam is split into two optical paths. A gated camera is placed in each optical path, and a timing pulse generator 9 is used to generate trigger pulses to control the recording of each gated camera. Image information at different times.

Since X-rays will pass through the first beam splitter 1 during the process of irradiating the scintillator 2, the first beam splitter 1 and the second beam splitter 3 both use beam splitter plates, because the beam splitter plate has a smaller thickness and can be Reduce the absorption of X-rays.

In order to prevent the gated camera from being directly irradiated by X-rays and reduce the interference of X-ray radiation to the camera, the low-magnification gated camera 12 and the high-power gated camera 10 are placed in a direction perpendicular to the incident direction of X-rays.

In this embodiment, three modes of variable magnification X-ray high-speed imaging can be formed by triggering pulse signals in different sequences by the timing pulse generator 9 .

One is: first trigger the high-magnification gated camera 10 of the high-magnification imaging channel to record image information, and then trigger the low-magnification gated camera 12 of the low-magnification imaging channel to record the image information, so as to realize the variable magnification recording of "high first and then low";

The second is: first trigger the low-magnification gated camera 12 of the low-magnification imaging channel to record image information, and then trigger the high-magnification gated camera 10 of the high-magnification imaging channel to record the image information, so as to realize the variable magnification recording of "low first and then high";

The third is: by alternately triggering the gated cameras of different channels, the variable magnification recording of "high and low" is realized.

Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and those of ordinary skill in the art can make a variety of similar It is indicated that such transformations fall within the protection scope of the present invention.

Claims (6)

1. A variable magnification X-ray high-speed imaging device, characterized in that it comprises a scintillator (2) for converting X-rays into fluorescence, and first beam splitters (2) are respectively arranged on both sides of the scintillator (2). 1) and the second beam splitter (3), a low-power lens group (6) and a low-power gated camera (12) are sequentially arranged on the exit light path of the fluorescent light passing through the first beam splitter (1), so as to form a low-power lens. A magnification imaging channel, a high magnification lens group (5) and a high magnification gated camera (10) are sequentially arranged on the exit light path of the fluorescence passing through the second beam splitter (3) to form a high magnification imaging channel, the high magnification lens group (5) The magnification is greater than that of the low-power lens group (6); Both the low magnification gated camera (12) and the high magnification gated camera (10) are connected to the timing pulse generator (9). 2. The variable magnification X-ray high-speed imaging device according to claim 1, wherein a first beam splitting prism (7) is arranged between the high-power lens group (5) and the high-power gated camera (10), and the high-power lens group (5) The number of gated cameras (10) is two. 3. The variable magnification X-ray high-speed imaging device according to claim 2, wherein a second beam splitting prism (8) is arranged between the low-power lens group (6) and the low-power gated camera (12). , the number of low magnification gated cameras (12) is two. 4. The variable magnification X-ray high-speed imaging device according to claim 3, characterized in that: the optical path of the low-magnification imaging channel is provided with a mirror (4), which is located between the low-power lens group (6) and the second between the beam splitting prisms (8). 5. The variable magnification X-ray high-speed imaging device according to claim 1, 2, 3, or 4, wherein the first beam splitter (1) and the second beam splitter (3) are both beam splitters. 6. The variable magnification X-ray high-speed imaging device according to claim 1 or 2 or 3 or 4, wherein the low-power gated camera (12) and the high-power gated camera (10) are placed in the same orientation as The incident direction of X-rays is vertical.

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