Method and system for nondestructive measurement of alkali metal content in alkali metal gas chamber

Abstract

The invention provides a method and a system for nondestructively measuring the content of alkali metal in an alkali metal gas chamber. The method comprises the following steps: driving alkali metal; selecting a light passing surface on one side as a calibration surface, and performing spot scanning detection on a first distance between the calibration surface and the laser to obtain a first surface distribution diagram H1 (x, y) of the distance between the calibration surface and the laser; driving alkali metal to a calibration surface; obtaining a proportional scale according to the actual area size corresponding to the pixel points of the shot image; calculating to obtain a shadow area, and obtaining a gas chamber inner wall surface alkali metal cluster horizontal plane distribution diagram S (x, y); a laser ranging technology is utilized to obtain a second surface distribution diagram H2 (x, y) of the distance between the calibration surface and the laser; calculating to obtain a height distribution diagram delta H (x, y) of the alkali metal clusters on the surface of the indoor wall; and calculating to obtain an alkali metal cluster volume distribution diagram on each pixel point, summing to obtain the volume of the total alkali metal, and calculating to obtain the mass of the alkali metal according to the volume. By applying the technical scheme of the invention, the technical problem that an accurate uncertainty index cannot be obtained by nondestructive measurement in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the field of quantum sensing technology, and in particular to a method and a system for non-destructively measuring the alkali metal content of an alkali metal gas chamber. Background Art

[0002] In recent years, alkali metal atomic sensor technology has been continuously developed with its advantages of high sensitivity, miniaturization, and low power consumption, and has been applied to many hot fields. For example, alkali metal atomic clocks are used in timekeeping, satellite navigation and other fields, and alkali metal atomic magnetometers are used in mineral exploration, biological magnetic exploration and other fields. The alkali metal atomic gas chamber is the core component of the alkali metal atomic sensor, which is used to provide stable and reliable atomic signals. Usually, the alkali metal gas chamber is made of glass material to obtain high light transmittance and low absorption loss to meet the needs of laser detection. However, alkali metal atoms are highly oxidizing, and glass materials are porous, so the pollutant gas will continue to be slowly released from the inner wall of the gas chamber to react with the alkali metal, resulting in a decrease in the number of atoms and a decrease in the effective signal, affecting the high performance of the atomic sensor. Therefore, the ability to non-destructively determine the alkali metal content in the closed gas chamber is of great significance for improving the life of the atomic sensor and extending the effective working time.

[0003] At present, the testing methods for alkali metal content in the gas chamber are mainly divided into two types: destructive testing and non-destructive testing. Destructive testing is to destroy the alkali metal gas chamber under a vacuum environment, and to deduce the alkali metal content by quantitatively introducing an oxidant to react with the alkali metal. This type of method is irreversible in the destruction of the gas chamber, which is not conducive to repeatable testing. There are two main non-destructive testing methods: DSC heat capacity detection method and image recognition method. The DSC method uses the specific melting point and specific heat capacity of alkali metals to determine the alkali metal content by measuring the endothermic peak. This method has a large error in the determination of alkali metal gas chambers with a weak content, which can reach more than 50%; the image recognition method uses a microscope scanning method to determine the bottom area of ​​the circular alkali metal, and theoretically infers the volume of the alkali metal. The theoretical calculation method is an ideal model, which is far from the actual situation and cannot derive an accurate uncertainty index. Summary of the invention

[0004] The present invention provides a method and system for non-destructively measuring the alkali metal content of an alkali metal gas chamber, which can solve the technical problem in the prior art that non-destructive measurement cannot obtain accurate uncertainty indicators.

[0005] According to one aspect of the present invention, a method for non-destructively measuring the alkali metal content of an alkali metal gas chamber is provided, and the method for non-destructively measuring the alkali metal content of an alkali metal gas chamber comprises: driving out the alkali metal in the atomic gas chamber, pasting heating plates on the outer surfaces of two light-transmitting surfaces facing the atomic gas chamber, and baking the light-transmitting surfaces at high temperature, at which time the surrounding temperature is low and the light-transmitting surface temperature is high, the alkali metal is enriched on the inner walls around the atomic gas chamber, and no alkali metal is enriched on the light-transmitting surfaces of the gas chamber, thereby forming a pair of clean light-transmitting surfaces of the gas chamber; selecting one side of the light-transmitting surface as a calibration surface, and the calibration range is the coverage range of the heating plate, using laser ranging technology, point scanning to detect the first distance between the calibration surface and the laser, and obtaining a first surface distribution map H1(x, y) of the distance between the calibration surface and the laser; driving the alkali metal in the atomic gas chamber to the calibration surface; calibrating the actual area size corresponding to the pixel points of the image taken by the microscope, and obtaining the scale ξ; placing the alkali metal gas chamber under a microscope, at which time part of the area is blocked by light due to the presence of alkali metal adhesion, forming a negative shadow, take a photo to record the shadow pattern; identify the number of pixels N corresponding to the shadow part of the image, use the calibrated scale ξ to calculate the shadow area, and obtain the horizontal plane distribution map S(x,y) of the alkali metal clusters on the inner wall surface of the air chamber; use the laser ranging technology to point scan and detect the second distance between the calibration surface and the laser, and obtain the second surface distribution map H2(x,y) of the distance between the calibration surface and the laser; subtract the first surface distribution map from the second surface distribution map to obtain the height distribution map ΔH(x,y) of the alkali metal clusters on the inner wall surface of the air chamber; multiply the horizontal plane distribution map S(x,y) of the alkali metal clusters on the inner wall surface of the air chamber with the height distribution map ΔH(x,y) to obtain the volume distribution map V(x,y)=S(x,y)*ΔH(x,y) of the alkali metal clusters on each pixel point, sum the volumes of the alkali metal clusters on all pixels to obtain the volume V=∑V(x,y) of the total alkali metal in the air chamber, and calculate the mass of the alkali metal according to the volume of the total alkali metal in the air chamber.

[0006] Furthermore, the shadow area S is calculated according to S=N*ξ, where N is the number of pixels corresponding to the shadow part of the image recognition, and ξ is the calibrated scale.

[0007] Furthermore, the mass of the alkali metal can be calculated according to M=ρ*V, wherein ρ is the density of the alkali metal, and V is the volume of the total alkali metal in the gas chamber.

[0008] Furthermore, driving the alkali metals in the atomic gas chamber to the calibration surface specifically includes: covering all the outer surfaces of the gas chamber except the calibration surface with heating plates, so that the alkali metals are enriched on the calibration surface to form a plurality of alkali metal condensation clusters.

[0009] Furthermore, calibrating the actual area size corresponding to the pixel points of the microscope image to obtain the scale ξ specifically includes: selecting an origin in the microscope, horizontally moving the origin using a high-precision displacement platform, recording the movement distance and the number of pixels moved by the origin on the captured image, obtaining the area size corresponding to a single pixel, and recording it as the scale ξ.

[0010] Furthermore, the atomic gas chamber is a cylindrical gas chamber, and the alkali metal includes rubidium.

[0011] According to another aspect of the present invention, a system for non-destructively measuring the alkali metal content of an alkali metal gas chamber is provided. The system for non-destructively measuring the alkali metal content of an alkali metal gas chamber measures the alkali metal content using the method for non-destructively measuring the alkali metal content of an alkali metal gas chamber as described above.

[0012] The technical solution of the present invention provides a method for non-destructively measuring the alkali metal content of an alkali metal gas chamber. The method is based on the image recognition method and further improves the accuracy. First, the bottom area of ​​the alkali metal is determined by scanning with a microscope, and then the alkali metal accumulation height is actually determined by laser ranging technology, so that the alkali metal volume is experimentally calculated, and then the alkali metal mass is obtained. The method of the present invention is completely measured using actual data, there is no theoretical estimation, and the uncertainty (depending on the test accuracy) can be accurately given, which has significant advantages for the determination of alkali metal gas chambers with weak content. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The included drawings are used to provide a further understanding of the embodiments of the present invention, which constitute a part of the specification, are used to illustrate the embodiments of the present invention, and together with the text description, explain the principles of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 A flow chart showing a method for non-destructively measuring the alkali metal content of an alkali metal gas chamber provided according to a specific embodiment of the present invention is shown;

[0015] Figure 2 A schematic structural diagram of an atomic gas chamber provided according to a specific embodiment of the present invention is shown. DETAILED DESCRIPTION

[0016] It should be noted that, in the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0018] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0019] like Figure 1As shown, according to a specific embodiment of the present invention, a method for non-destructively measuring the alkali metal content of an alkali metal gas chamber is provided, and the method for non-destructively measuring the alkali metal content of an alkali metal gas chamber comprises: driving out the alkali metal in the atomic gas chamber, pasting heating plates on the outer surfaces of two light-transmitting surfaces facing the atomic gas chamber, and baking the light-transmitting surfaces at high temperature, at which time the surrounding temperature is low and the light-transmitting surface temperature is high, the alkali metal is enriched on the inner walls around the atomic gas chamber, and there is no alkali metal enrichment on the light-transmitting surfaces of the gas chamber, so as to form a pair of clean light-transmitting surfaces of the gas chamber; selecting one side of the light-transmitting surface as the calibration surface, and the calibration range is the coverage range of the heating plate, using laser ranging technology, point scanning to detect the first distance between the calibration surface and the laser, and obtaining a first surface distribution map H1(x, y) of the distance between the calibration surface and the laser; driving the alkali metal in the atomic gas chamber to the calibration surface; calibrating the actual area size corresponding to the pixel points of the microscope-photographed image, and obtaining the scale ξ; placing the alkali metal gas chamber under a microscope, at which time part of the area is blocked by light due to the presence of alkali metal adhesion, A shadow is formed, and a photo is taken to record the shadow pattern; the number of pixel points N corresponding to the shadow part is identified by the image, and the shadow area is calculated using the calibrated scale ξ to obtain the horizontal plane distribution map S(x, y) of the alkali metal clusters on the inner wall surface of the air chamber; the laser ranging technology is used to detect the second distance between the calibration surface and the laser by point scanning to obtain the second surface distribution map H2(x, y) of the distance between the calibration surface and the laser; the first surface distribution map is correspondingly subtracted from the second surface distribution map to obtain the height distribution map ΔH(x, y) of the alkali metal clusters on the inner wall surface of the air chamber; the horizontal plane distribution map S(x, y) of the alkali metal clusters on the inner wall surface of the air chamber is correspondingly multiplied with the height distribution map ΔH(x, y) to obtain the volume distribution map V(x, y) = S(x, y) * ΔH(x, y) of the alkali metal clusters on each pixel point, the volume of the alkali metal clusters on all pixel points is summed to obtain the total volume V = ∑V(x, y) of the alkali metal in the air chamber, and the mass of the alkali metal is calculated based on the volume of the total alkali metal in the air chamber.

[0020] By using this configuration, a method for non-destructively measuring the alkali metal content of an alkali metal gas chamber is provided. The method is based on the image recognition method and further improves the accuracy. First, the bottom area of ​​the alkali metal is determined by scanning with a microscope, and then the alkali metal accumulation height is actually determined by laser ranging technology, so that the alkali metal volume is experimentally calculated, and then the alkali metal mass is obtained. The method of the present invention is completely measured using actual data, and there is no theoretical estimation. The uncertainty (depending on the test accuracy) can be accurately given, which has significant advantages for the determination of alkali metal gas chambers with weak content.

[0021] Specifically, in the present invention, in order to test the alkali metal content, the alkali metal in the atomic gas chamber is first driven out, and heating plates are attached to the outer surfaces of the two light-transmitting surfaces of the atomic gas chamber, and the light-transmitting surfaces are baked at high temperature. At this time, the temperature around is low and the temperature of the light-transmitting surfaces is high. The alkali metals are enriched on the inner walls around the atomic gas chamber, and there is no alkali metal enrichment on the light-transmitting surfaces of the gas chamber, forming a pair of clean light-transmitting surfaces of the gas chamber.

[0022] As a specific embodiment of the present invention, the atomic gas chamber is a cylindrical gas chamber, and the alkali metal includes rubidium. The alkali metal in the atomic gas chamber is driven out. Taking the cylindrical gas chamber and the alkali metal rubidium as an example, heating plates of suitable size are attached to the outer surfaces of the two light-transmitting surfaces facing each other, and the light-transmitting surfaces are baked at high temperature. At this time, the surrounding temperature is low, and the temperature of the light-transmitting surface is high. The alkali metal is enriched on the inner wall of the cylinder around the gas chamber, and there is no alkali metal enrichment on the light-transmitting surface of the gas chamber, forming a pair of clean light-transmitting surfaces of the gas chamber.

[0023] Furthermore, one side of the light-transmitting surface is selected as the calibration surface, and the calibration range is the coverage range of the heating plate. The laser ranging technology is used to perform point scanning to detect the first distance between the calibration surface and the laser, and a first surface distribution map H1 (x, y) of the distance between the calibration surface and the laser is obtained.

[0024] Next, the alkali metals in the atomic gas chamber are driven to the calibration surface. In order to facilitate the test and reduce the test error, the outer surfaces of all gas chambers except the calibration surface are covered with heating sheets, and the alkali metals are enriched on the calibration surface to form multiple alkali metal condensation clusters.

[0025] Furthermore, the actual area size corresponding to the pixel points of the microscope image is calibrated to obtain the scale ξ. First, an origin is selected in the microscope, and the origin is horizontally moved using a high-precision displacement platform. The displacement distance and the number of pixels moved by the origin on the captured image are recorded to obtain the area size corresponding to a single pixel point, which is recorded as the scale ξ (unit: square micrometers per pixel point).

[0026] After obtaining the scale ξ, the alkali metal gas chamber can be placed under a microscope. At this time, the light is blocked in some areas due to the presence of alkali metal adhesion, forming a shadow, and a photo is taken to record the shadow pattern; the number of pixels N corresponding to the shadow part of the image recognition is used, and the shadow area is calculated using the calibrated scale ξ to obtain the horizontal plane distribution map S(x, y) of the alkali metal clusters on the inner wall surface of the gas chamber; in the present invention, the shadow area S is calculated according to S=N*ξ, wherein N is the number of pixels corresponding to the shadow part of the image recognition, and ξ is the calibrated scale.

[0027] Furthermore, laser ranging technology is used to detect the second distance between the calibration surface and the laser by point scanning, and a second-surface distribution map H2(x, y) of the distance between the calibration surface and the laser is obtained; the first-surface distribution map is subtracted from the second-surface distribution map to obtain a height distribution map ΔH(x, y) of the alkali metal clusters on the inner wall surface of the air chamber.

[0028] Finally, the horizontal distribution map S(x, y) of the alkali metal clusters on the inner wall surface of the air chamber is multiplied with the height distribution map ΔH(x, y) to obtain the volume distribution map of the alkali metal clusters at each pixel point V(x, y) = S(x, y) * ΔH(x, y), and the volume of the alkali metal clusters at all pixels is summed to obtain the volume of the total alkali metal in the air chamber V = ∑V(x, y), and the mass of the alkali metal is calculated based on the volume of the total alkali metal in the air chamber. In the present invention, the mass of the alkali metal can be calculated based on M = ρ * V, where ρ is the density of the alkali metal and V is the volume of the total alkali metal in the air chamber.

[0029] According to another aspect of the present invention, a system for non-destructively measuring the alkali metal content of an alkali metal gas chamber is provided. The system for non-destructively measuring the alkali metal content of an alkali metal gas chamber measures the alkali metal content using the method for non-destructively measuring the alkali metal content of an alkali metal gas chamber as described above.

[0030] In order to further understand the present invention, the following Figure 1 and Figure 2 The method for non-destructively measuring the alkali metal content in an alkali metal gas chamber provided by the present invention is described in detail.

[0031] like Figure 1 and Figure 2 As shown, according to a specific embodiment of the present invention, a method for non-destructively measuring the alkali metal content of an alkali metal gas chamber is provided, and the method specifically includes the following steps.

[0032] Step one, drive out the alkali metals in the atomic gas chamber. Taking the cylindrical gas chamber and the alkali metal rubidium as an example, a heating plate of suitable size is pasted on the outer surfaces of the two light-transmitting surfaces facing each other, and the light-transmitting surfaces are baked at high temperature. At this time, the temperature around is low and the temperature of the light-transmitting surfaces is high. The alkali metals are enriched on the inner walls of the cylinder around the gas chamber, and there is no alkali metal enrichment on the light-transmitting surfaces of the gas chamber, forming a pair of clean light-transmitting surfaces of the gas chamber.

[0033] Step 2: Select one side surface as the calibration surface, the calibration range is the coverage range of the heating plate, and use laser ranging technology to point scan and detect the first distance between the calibration surface and the laser to obtain the first surface distribution map H1(x, y) of the distance between the calibration surface and the laser.

[0034] Step three, driving the alkali metal to the calibration surface, covering all the outer surfaces of the gas chamber except the calibration surface with heating plates, and the alkali metal is enriched on the calibration surface to form multiple rubidium condensation clusters.

[0035] Step 4: Calibrate the actual area size corresponding to the pixel points of the microscope image to obtain the scale. First, select an origin in the microscope, use a high-precision displacement platform to horizontally move the origin, record the displacement distance and the number of pixels moved by the origin on the captured image, and obtain the area size corresponding to a single pixel, which is recorded as the scale ξ (unit square micrometers per pixel).

[0036] Step 5: Place the alkali metal gas chamber under a microscope. At this time, due to the presence of rubidium attachment, some areas block the light and form shadows. Take a photo to record the shadow pattern. The number of pixels N corresponding to the shadow part of the image recognition is obtained. Using the calibrated scale ξ, the shadow area S = N*ξ is obtained. At the same time, the horizontal plane distribution map S(x,y) of the rubidium clusters on the inner wall surface of the gas chamber is obtained.

[0037] Step 6: Using laser ranging technology, point scanning is performed to detect the second distance between the calibration surface and the laser, and a second-surface distribution map H2(x, y) of the distance between the calibration surface and the laser is obtained; the first-surface distribution map is correspondingly subtracted from the second-surface distribution map to obtain a height distribution map ΔH(x, y) of the rubidium clusters on the inner wall surface of the air chamber;

[0038] Step 7: Multiply the horizontal distribution map S(x,y) of the rubidium clusters on the inner wall surface of the air chamber with the height distribution map ΔH(x,y) to obtain the volume distribution map of the rubidium clusters at each pixel point V(x,y)=S(x,y)*ΔH(x,y), and sum them to obtain the volume of the total alkali metal rubidium in the air chamber V=∑V(x,y). The mass of alkali metal rubidium is M=ρ*V (ρ is the density of alkali metal).

[0039] In summary, the present invention provides a method for non-destructively measuring the alkali metal content of an alkali metal gas chamber. The method is based on the image recognition method and further improves the accuracy. First, the bottom area of ​​the alkali metal is determined by scanning with a microscope, and then the alkali metal stacking height is actually determined by laser ranging technology, so that the alkali metal volume is experimentally calculated, and then the alkali metal mass is obtained. The method of the present invention is completely measured using actual data, there is no theoretical estimation, and the uncertainty (depending on the test accuracy) can be accurately given, which has significant advantages for the determination of alkali metal gas chambers with weak content.

[0040] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0041] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for non-destructively measuring the alkali metal content of an alkali metal gas chamber, characterized in that: The method for non-destructively measuring the alkali metal content of an alkali metal gas chamber comprises: To drive away the alkali metals in the atomic gas chamber, a heating sheet is attached to the outer surfaces of the two light-transmitting surfaces of the atomic gas chamber, and the light-transmitting surfaces are baked at high temperature. At this time, the surrounding temperature is low and the light-transmitting surface temperature is high. The alkali metals are enriched on the inner walls around the atomic gas chamber, and no alkali metals are enriched on the light-transmitting surfaces of the gas chamber, forming a pair of clean light-transmitting surfaces of the gas chamber; Select one side of the light-transmitting surface as the calibration surface, and the calibration range is the coverage range of the heating plate. Use laser ranging technology to point scan and detect the first distance between the calibration surface and the laser, and obtain the first surface distribution map H1(x, y) of the distance between the calibration surface and the laser; driving the alkali metal in the atomic gas chamber to the calibration surface; Calibrate the pixel points of the microscope image corresponding to the actual area size to obtain the scale ξ; The alkali metal gas chamber is placed under a microscope. At this time, the light is blocked in some areas due to the presence of alkali metal adhesion, forming a shadow. The shadow pattern is recorded by taking a photo. The number of pixels N corresponding to the shadow part is image-recognized, and the shadow area is calculated using the calibrated scale ξ to obtain the horizontal plane distribution map S(x,y) of the alkali metal clusters on the inner wall surface of the gas chamber. Using laser ranging technology, point scanning is used to detect the second distance between the calibration surface and the laser, and a second-surface distribution map H2(x, y) of the distance between the calibration surface and the laser is obtained; the first-surface distribution map is correspondingly subtracted from the second-surface distribution map to obtain a height distribution map ΔH(x, y) of the alkali metal clusters on the inner wall surface of the air chamber; The horizontal distribution map S(x,y) of the alkali metal clusters on the inner wall surface of the air chamber is multiplied with the height distribution map ΔH(x,y) to obtain the volume distribution map of the alkali metal clusters at each pixel point V(x,y)=S(x,y)*ΔH(x,y). The volume of the alkali metal clusters at all pixel points is summed to obtain the volume of the total alkali metal in the air chamber V=∑V(x,y). The mass of the alkali metal is calculated based on the volume of the total alkali metal in the air chamber.

2. The method for non-destructively measuring the alkali metal content of an alkali metal gas chamber according to claim 1, characterized in that: The shadow area S is calculated according to S=N*ξ, wherein N is the number of pixels corresponding to the shadow part of the image recognition, and ξ is the calibrated scale.

3. The method for non-destructively measuring the alkali metal content of an alkali metal gas chamber according to claim 1, characterized in that: The mass of the alkali metal can be calculated according to M=ρ*V, wherein ρ is the density of the alkali metal, and V is the volume of the total alkali metal in the gas chamber.

4. The method for non-destructively measuring the alkali metal content of an alkali metal gas chamber according to claim 3, characterized in that: Driving the alkali metal in the atomic gas chamber to the calibration surface specifically includes: covering all the outer surfaces of the gas chamber except the calibration surface with heating plates, so that the alkali metal is enriched on the calibration surface to form a plurality of alkali metal condensation clusters.

5. The method for non-destructively measuring the alkali metal content of an alkali metal gas chamber according to claim 4, characterized in that: Calibrate the actual area size corresponding to the pixel points of the microscope image to obtain the scale ξ, which specifically includes: selecting an origin in the microscope, horizontally moving the origin using a high-precision displacement platform, recording the movement distance and the number of pixels moved by the origin on the captured image, and obtaining the area size corresponding to a single pixel, which is recorded as the scale ξ.

6. The method for non-destructively measuring the alkali metal content of an alkali metal gas chamber according to claim 5, characterized in that: The atomic gas chamber is a cylindrical gas chamber, and the alkali metal includes rubidium.

7. A system for non-destructively measuring the alkali metal content of an alkali metal gas chamber, characterized in that: The system for nondestructively measuring the alkali metal content of an alkali metal gas cell measures the alkali metal content using the method for nondestructively measuring the alkali metal content of an alkali metal gas cell according to any one of claims 1 to 6.

Images