Infrared long-optical-path gas chamber

Abstract

The utility model discloses an infrared long-optical-path gas chamber which comprises a light source adjusting mechanism, a cavity structure and a spherical reflector group, wherein the light source adjusting mechanism is used for shaping and turning primary emergent light; the cavity structure is used for introducing and discharging gas to be detected; the spherical reflector group is used for reflecting infrared light; the light source adjusting mechanism comprises a first shell. A light source emitter, an off-axis parabolic mirror, a detector and a plane mirror are arranged in the first shell from top to bottom. The cavity structure comprises a second shell with an air chamber, the first shell is communicated with the second shell, the upper end of the second shell is connected with an air inlet communicated with the air chamber, the lower end of the second shell is connected with an air outlet communicated with the air chamber, and the spherical reflector set is located in the air chamber and can be used for reflecting light in a limited volume. The optical path is increased, and the measurement requirement of higher precision of gas is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of optical path gas chamber, more specifically, a kind of infrared long optical path gas chamber belongs to gas detection technical field. BACKGROUND

[0002] Gas chamber is one of important devices of infrared spectrum quantitative analysis, and influences the detection sensitivity and response time of spectrum analysis.The longer the absorption optical path in gas chamber is, the more conducive to improve the detection sensitivity, and the smaller the volume is, the more conducive to reduce response time.With the increasing requirement of precision in gas detection field, the optical path of gas chamber also needs to be further improved.Longer optical path needs to be realized in limited volume, and more reflection needs to be realized by absorption cell.

[0003] Gas chamber with white cell structure is one of common types of infrared spectrum analysis.Usually, longer optical path is realized by adjusting light path inside gas chamber, for example, CN113484266B realizes optical path multiplication by optical path multiplication device.And longer optical path is realized outside gas chamber, for example, CN102053063B realizes optical path multiplication by replacing exit plane mirror with corner reflector.But the optical path of current gas chamber can only be multiplied, and the application range is limited. SUMMARY

[0004] To solve the above technical problems of prior art, the utility model provides a kind of infrared long optical path gas chamber with the technical features that longer optical path can be increased in limited volume, and higher precision measurement requirement of gas is met.

[0005] To achieve the above purpose, the utility model is realized by the following technical scheme:

[0006] The utility model discloses a kind of infrared long optical path gas chamber, including the light source adjusting mechanism for shaping and turning primary exit light, the cavity structure for introducing and discharging the gas to be measured and the spherical mirror group for reflecting infrared light;The light source adjusting mechanism includes a housing, light source emitter, off-axis parabolic mirror, detector, plane mirror are arranged from top to bottom in the housing;The cavity structure includes the second housing with gas chamber, the first housing is communicated with the second housing, the second housing is connected with the gas inlet communicated with gas chamber on upper end, the second housing is connected with the gas outlet communicated with gas chamber on lower end, and the spherical mirror group is located in gas chamber.

[0007] Preferably, the spherical mirror group includes first spherical mirror, second spherical mirror, main spherical mirror, the first spherical mirror and second spherical mirror are located at the right side of gas chamber, and are symmetrically arranged from top to bottom with the middle part of right side of gas chamber as reference, the main spherical mirror is located at the left side of gas chamber and at the middle part of left side of gas chamber, and first spherical mirror, second spherical mirror and main spherical mirror constitute white cell mirror group.

[0008] Preferably, the upper right corner of the second housing is connected to an air inlet, and the lower left corner of the second housing is connected to an air outlet. The air inlet and air outlet are located diagonally so that the gas to be tested can fill the entire gas chamber evenly and quickly.

[0009] Preferably, the first spherical mirror, the second spherical mirror, and the main spherical mirror are all gold-plated reflectors.

[0010] Preferably, both the off-axis parabolic mirror and the plane mirror are connected to a motor shaft to enable rotation.

[0011] Preferably, the first spherical mirror, the main spherical mirror, and the second spherical mirror are all connected to a motor shaft to enable rotation.

[0012] Beneficial effects: The technical solution of this utility model can increase the optical path within a limited volume, thereby meeting the requirements for higher precision gas measurement; the optical path can be adjusted by changing the incident angle and direction to achieve multiple ranges, making the application more flexible; the gas chamber has the same structure, and after multiple reflections, it has high space utilization, small volume, and fast response speed. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings, but the present invention is not limited to the following embodiments.

[0015] like Figure 1 The illustration shows a specific embodiment of an infrared long-path gas chamber. This embodiment includes a light source adjustment mechanism 1 for shaping and redirecting primary emitted light, a cavity structure for introducing and venting the gas to be tested, and a spherical reflector group for reflecting infrared light. The light source adjustment mechanism 1 includes a first housing, in which a light source emitter 11, an off-axis parabolic mirror 12, a detector 13, and a plane reflector 14 are arranged from top to bottom. The cavity structure includes a second housing 2 with a gas chamber 21. The first housing and the second housing 2 are connected. The upper end of the second housing 2 is connected to an inlet 22 communicating with the gas chamber 21, and the lower end of the second housing 2 is connected to an outlet 26 communicating with the gas chamber 21. The spherical reflector group is located inside the gas chamber 21. The spherical mirror assembly includes a first spherical mirror 23, a second spherical mirror 25, and a main spherical mirror 24. The first spherical mirror 23 and the second spherical mirror 25 are located on the right side of the air chamber 21 and are arranged symmetrically with the middle of the right side of the air chamber 21 as the reference. The main spherical mirror 24 is located on the left side of the air chamber 21 and is located at the middle of the left side of the air chamber 21. The first spherical mirror 23, the second spherical mirror 25, and the main spherical mirror 24 constitute the White Pool mirror assembly.

[0016] Operating mode: The light source emitter 11 emits infrared light, which is reflected multiple times by the first spherical mirror 23, the main spherical mirror 24 and the second spherical mirror 25 before being emitted. The beam is then redirected by the plane mirror 14 to the off-axis parabolic mirror 12, which shapes and redirects the beam to the gas chamber 21. The beam is then emitted again after passing through the first spherical mirror 23, the main spherical mirror 24 and the second spherical mirror 25. The detector 13 then receives the light signal with absorption intensity. The incremental optical path can be changed by adjusting the redirection angle.

[0017] The steering angle can be adjusted by a motor with a controller. Specifically, the off-axis parabolic mirror 12 and the plane mirror 14 are both connected to motor shafts to enable rotation. The first spherical mirror 23, the main spherical mirror 24, and the second spherical mirror 25 are all connected to motor shafts to enable rotation.

[0018] In a preferred embodiment, the upper right corner of the second housing 2 is connected to an air inlet 22, and the lower left corner of the second housing 2 is connected to an air outlet 26. The air inlet 22 and the air outlet 26 are located diagonally so that the gas to be tested can fill the entire gas chamber 21 evenly and quickly.

[0019] In a preferred embodiment, the first spherical mirror 23, the second spherical mirror 25, and the main spherical mirror 24 are all gold-plated reflectors.

[0020] Finally, it should be noted that this utility model is not limited to the above embodiments, and many variations are possible. All variations that can be directly derived or conceived by those skilled in the art from the disclosure of this utility model should be considered within the protection scope of this utility model.

Claims

1. An infrared long-path gas chamber, characterized in that: The system includes a light source adjustment mechanism (1) for shaping and redirecting the emitted light, a cavity structure for introducing and discharging the gas to be tested, and a spherical reflector group for reflecting infrared light. The light source adjustment mechanism (1) includes a first housing, in which a light source emitter (11), an off-axis parabolic mirror (12), a detector (13), and a plane reflector (14) are arranged from top to bottom. The cavity structure includes a second housing (2) with a gas chamber (21), and the first housing and the second housing (2) are connected. The upper end of the second housing (2) is connected to an air inlet (22) that communicates with the gas chamber (21), and the lower end of the second housing (2) is connected to an air outlet (26) that communicates with the gas chamber (21). The spherical reflector group is located inside the gas chamber (21).

2. The infrared long-path gas chamber according to claim 1, characterized in that: The spherical mirror group includes a first spherical mirror (23), a second spherical mirror (25), and a main spherical mirror (24). The first spherical mirror (23) and the second spherical mirror (25) are located on the right side of the air chamber (21) and are arranged symmetrically with the middle of the right side of the air chamber (21) as the reference. The main spherical mirror (24) is located on the left side of the air chamber (21) and is located in the middle of the left side of the air chamber (21). The first spherical mirror (23), the second spherical mirror (25), and the main spherical mirror (24) constitute the White Pool mirror group.

3. The infrared long-path gas chamber according to claim 2, characterized in that: The upper right corner of the second housing (2) is connected to an air inlet (22), and the lower left corner of the second housing (2) is connected to an air outlet (26). The air inlet (22) and the air outlet (26) are located diagonally so that the gas to be tested can fill the entire gas chamber (21) evenly and quickly.

4. An infrared long-path gas chamber according to claim 2 or 3, characterized in that: The first spherical mirror (23), the second spherical mirror (25), and the main spherical mirror (24) are all gold-plated reflectors.

5. An infrared long-path gas chamber according to claim 2 or 3, characterized in that: The off-axis parabolic mirror (12) and the plane mirror (14) are both connected to a motor shaft to enable rotation.

6. An infrared long-path gas chamber according to claim 2 or 3, characterized in that: The first spherical mirror (23), the main spherical mirror (24), and the second spherical mirror (25) are all connected to a motor shaft to enable rotation.

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