Manufacturing method of long-light-path short gas cell for CRDS

Abstract

The invention is suitable for the field of long-light-path short gas cells of CRDS, and provides a manufacturing method of a long-light-path short gas cell for CRDS, according to a design drawing, high-precision machining equipment is used for machining optical elements, and the optical elements comprise a reflecting mirror and a concave mirror; according to a design drawing, the air chamber is manufactured through the machining technology, the inner surface of the air chamber is smooth, and the accurate size and shape are kept; gas inlets and outlets are formed in the two ends and / or the side face of the gas chamber, and gas connectors and valves are installed for ensuring that gas can enter and be discharged smoothly; according to a design drawing, an optical element is installed in an air chamber, and mirror surfaces of a reflecting mirror and a concave mirror are aligned and stably fixed; an optical element is installed in the air chamber, and the optical path is increased; a long optical path is realized in a relatively short gas cell through a multi-reflection mirror surface design, so that the detection sensitivity is improved; compared with a traditional long-light-path gas cell, the long-light-path short gas cell is compact in design and suitable for portable and space-limited applications.

Description

Technical Field

[0001] The present invention relates to the field of long optical path short gas cell for CRDS, and more specifically, to a method for manufacturing a long optical path short gas cell for CRDS. Background Art

[0002] CRDS technology is a highly sensitive spectral analysis technology used to detect gas composition and concentration. It can be used to detect the absolute optical extinction of a sample, including light scattering and absorption. It has been widely used to detect the absorption of gaseous samples at specific wavelengths and can determine the mole fraction of a sample at the trillionth level.

[0003] CRDS technology has a wide range of applications, such as multi-gas detection, suitable for detecting a variety of gas components, including greenhouse gases, pollutant gases and industrial process gases, etc.; or environmental monitoring, real-time monitoring of pollutants and greenhouse gas concentrations in the air, and assessment of air quality and climate change; or industrial process control, detecting gas components in industrial processes, optimizing process parameters, and improving production efficiency and safety; or medical research, detecting respiratory gas components for disease diagnosis and health monitoring; or scientific research applications, conducting high-sensitivity gas analysis research in the fields of chemistry, physics and environmental science. CRDS's long optical path short gas cell provides the advantages of portability and rapid response while maintaining high sensitivity, and is suitable for a variety of application scenarios. It is an efficient and flexible gas analysis tool.

[0004] Traditional CRDS systems usually use a long optical path gas cell to increase the optical path and thus improve the detection sensitivity. However, the long optical path gas cell is large and not suitable for portable and space-constrained applications. The long optical path short gas cell design aims to reduce the volume of the gas cell while maintaining high sensitivity; therefore, a method for fabricating a long optical path short gas cell for CRDS is proposed. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art: the long optical path gas cell is large in size and is not suitable for portable and space-constrained applications. The long optical path short gas cell design aims to reduce the volume of the gas cell while maintaining high sensitivity, and a method for manufacturing a long optical path short gas cell for CRDS is proposed.

[0006] The specific technical solution is: a method for making a long optical path short gas cell for CRDS, comprising the following steps: Step 1: Optical component processing According to the design drawings, use high-precision processing equipment to process optical components, including reflectors and concave mirrors; Step 2: Air Chamber Manufacturing According to the design drawings, the air chamber is manufactured using processing technology to make its internal surface smooth and maintain precise size and shape; Design gas inlets and outlets at both ends and / or sides of the gas chamber, and install gas interfaces and valves to ensure that the gas can enter and discharge smoothly; Step 3: Assembly According to the design drawings, install the optical components in the air chamber, align and stabilize the mirror surfaces of the reflector and concave mirror; Step 4: Beam Adjustment Adjust the direction and focus of the light beam to ensure that the light beam propagates stably and reflects multiple times in the gas chamber.

[0007] The method for manufacturing a long optical path short gas cell for CRDS of the present invention can manufacture a long optical path short gas cell with high sensitivity; the optical element is installed in the gas chamber, and the mirror surfaces of the reflector and the concave mirror are aligned and stably fixed to increase the optical path; that is, through the multiple reflection mirror design, a long optical path is achieved in a shorter gas cell, thereby improving the detection sensitivity; compared with the traditional long optical path gas cell, the long optical path short gas cell has a compact design and is suitable for portable and space-constrained applications; it can be integrated with other detection components to form a miniaturized and portable gas analysis system.

[0008] The technical solution of this application is further described below: In one embodiment, the design drawings include optical design drawings, gas system design drawings and material selection drawings.

[0009] Furthermore, the optical drawings are made by using computer-aided design software to design an optical system, and the optical system design includes optical cavity, mirror arrangement and optical path optimization; Design gas system drawings are made by designing gas inlets and outlets, gas chamber volumes, and gas flow paths; The material selection drawing plans out the selection of high reflectivity lenses and metal or plastic materials with good airtightness.

[0010] In one of the embodiments, in the optical element processing of step 1, the high-precision processing equipment includes a CNC machine tool and a laser cutting machine; according to the design drawings, the CNC machine tool and / or the laser cutting machine are used to process the optical elements including the reflector and the concave mirror.

[0011] In one of the embodiments, in the step 2 of manufacturing the air chamber, the processing technology includes CNC milling and 3D printing; according to the design drawings, the air chamber is manufactured using CNC milling and / or 3D printing to make its internal surface smooth and maintain precise size and shape.

[0012] In one of the embodiments, in the assembly of step three, a high-reflectivity reflector and a concave mirror are installed at both ends of the cavity, and the laser is aligned with the mirror and the concave mirror at one end of the gas pool, so that the laser can enter the cavity and reflect multiple times, which is used to ensure that the light beam can be reflected multiple times in the cavity; according to the design drawings, the optical elements are installed in the gas chamber, and the mirror surfaces of the reflector and the concave mirror are aligned and stably fixed.

[0013] Furthermore, in the assembly of step three, the angles and positions of the reflector and the concave mirror are adjusted so that the light beam is reflected multiple times in the cavity along an optimized path.

[0014] High reflectivity mirrors and optimized optical design reduce light loss and noise, improving signal-to-noise ratio.

[0015] In one of the embodiments, in step 4, an optical property test is added, and the mirror reflectivity of the reflector and concave mirror and the transmittance of the optical system are tested using standard optical testing equipment.

[0016] In one embodiment, the method for making a long optical path short gas cell for CRDS further includes a sensitivity test; Among them, the sensitivity test uses a standard gas sample of known concentration to verify the sensitivity and detection limit of the gas cell.

[0017] In one embodiment, the method for making a long optical path short gas cell for CRDS further includes a leak detection for detecting the sealing of the gas cell to ensure that there is no gas leakage affecting the results in high-sensitivity measurements.

[0018] Compared with the prior art, the method for making a long optical path short gas cell for CRDS of the present invention can achieve the following: The method for manufacturing a long optical path short gas cell for CRDS of the present invention can manufacture a long optical path short gas cell with high sensitivity; the optical element is installed in the gas chamber, and the mirror surfaces of the reflector and the concave mirror are aligned and stably fixed to increase the optical path; that is, through the multiple reflection mirror design, a long optical path is achieved in a shorter gas cell, thereby improving the detection sensitivity; compared with the traditional long optical path gas cell, the long optical path short gas cell has a compact design and is suitable for portable and space-constrained applications; it can be integrated with other detection components to form a miniaturized and portable gas analysis system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The present invention is a flowchart of a method for manufacturing a long optical path short gas cell for CRDS. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Example 1

[0021] like Figure 1 As shown, the specific technical solution is: a method for making a long optical path short gas cell for CRDS, comprising the following steps: Step 1: Optical component processing According to the design drawings, use high-precision processing equipment to process optical components, including reflectors and concave mirrors; Step 2: Air Chamber Manufacturing According to the design drawings, the air chamber is manufactured using processing technology to make its internal surface smooth and maintain precise size and shape; Design gas inlets and outlets at both ends and / or sides of the gas chamber, and install gas interfaces and valves to ensure that the gas can enter and discharge smoothly; Step 3: Assembly According to the design drawings, install the optical components in the air chamber, align and stabilize the mirror surfaces of the reflector and concave mirror; Step 4: Beam Adjustment Adjust the direction and focus of the light beam to ensure that the light beam propagates stably and reflects multiple times in the gas chamber.

[0022] The method for manufacturing a long optical path short gas cell for CRDS of the present invention can manufacture a long optical path short gas cell with high sensitivity; the optical element is installed in the gas chamber, and the mirror surfaces of the reflector and the concave mirror are aligned and stably fixed to increase the optical path; that is, through the multiple reflection mirror design, a long optical path is achieved in a shorter gas cell, thereby improving the detection sensitivity; compared with the traditional long optical path gas cell, the long optical path short gas cell has a compact design and is suitable for portable and space-constrained applications; it can be integrated with other detection components to form a miniaturized and portable gas analysis system. Example 2

[0023] The embodiment of the present invention is based on the embodiment 1, and adds: The design drawings include optical design drawings, gas system design drawings and material selection drawings.

[0024] Furthermore, the optical drawings are made by using computer-aided design (AutoCAD) software to design the optical system, which includes optical cavity, mirror arrangement and optical path optimization; the gas system design drawings are made by designing gas inlets and outlets, gas chamber volume and airflow path; the material selection drawings plan to select high-reflectivity lenses, and metal or plastic materials with good airtightness. Example 3

[0025] The embodiment of the present invention is based on the embodiment 1, and adds: In the optical element processing of step 1, the high-precision processing equipment includes a CNC machine tool and a laser cutting machine; according to the design drawings, the CNC machine tool and / or the laser cutting machine are used to process the optical elements including the reflector and the concave mirror. Example 4

[0026] The embodiment of the present invention is based on the embodiment 1, and adds: In the step 2 of manufacturing the air chamber, the processing technology includes CNC milling and 3D printing; according to the design drawings, the air chamber is manufactured by CNC milling and / or 3D printing to make its internal surface smooth and maintain precise size and shape. Example 5

[0027] The embodiment of the present invention is based on the embodiment 1, and adds: In the assembly of step three, a high-reflectivity reflector and a concave mirror are installed at both ends of the cavity, and the laser is aligned with the mirror and the concave mirror at one end of the gas pool, so that the laser can enter the cavity and reflect multiple times, which is used to ensure that the light beam can be reflected multiple times in the cavity; according to the design drawings, the optical elements are installed in the gas chamber, and the mirror surfaces of the reflector and the concave mirror are aligned and stably fixed.

[0028] Furthermore, in the assembly of step three, the angles and positions of the reflector and the concave mirror are adjusted so that the light beam is reflected multiple times in the cavity along an optimized path.

[0029] High reflectivity mirrors and optimized optical design reduce light loss and noise, improving signal-to-noise ratio. Example 6

[0030] The embodiment of the present invention is based on the embodiment 1, and adds: In the step 4, an optical property test is added, and the mirror reflectivity of the reflector and the concave mirror and the transmittance of the optical system are tested using standard optical testing equipment. Example 7

[0031] The embodiment of the present invention is based on the embodiment 1, and adds: The method for making a long optical path short gas cell for CRDS also includes a sensitivity test; Among them, the sensitivity test uses a standard gas sample of known concentration to verify the sensitivity and detection limit of the gas cell. Example 8

[0032] The embodiment of the present invention is based on the embodiment 1, and adds: The method for manufacturing a long optical path short gas cell for CRDS also includes a leak detection for detecting the sealing of the gas cell to ensure that there is no gas leakage affecting the result in high-sensitivity measurement. Example 9

[0033] A method for manufacturing a long optical path short gas cell for CRDS comprises the following steps: The design drawings include optical design drawings, gas system design drawings and material selection drawings; the optical design drawings are made by using computer-aided design software to design the optical system, and the optical system design includes optical cavity, mirror arrangement and optical path optimization; the gas system design drawings are made by designing gas inlets and outlets, gas chamber volume and airflow path; the material selection drawings plan to select high-reflectivity lenses, as well as metal or plastic materials with good airtightness.

[0034] Step 1: Optical component processing According to the design drawings, use high-precision processing equipment to process optical components, including reflectors and concave mirrors; Step 2: Air Chamber Manufacturing According to the design drawings, the air chamber is manufactured using processing technology to make its internal surface smooth and maintain precise size and shape; Design gas inlets and outlets at both ends and / or sides of the gas chamber, and install gas interfaces and valves to ensure that the gas can enter and discharge smoothly; Step 3: Assembly According to the design drawings, install the optical components in the air chamber, align and stabilize the mirror surfaces of the reflector and concave mirror; Step 4: Beam Adjustment Adjust the direction and focus of the light beam to ensure that the light beam propagates stably and reflects multiple times in the gas chamber.

[0035] The method for making a long optical path short gas cell for CRDS also includes a sensitivity test, wherein the sensitivity test uses a standard gas sample of known concentration to verify the sensitivity and detection limit of the gas cell. The method for making a long optical path short gas cell for CRDS also includes a leak test, which is used to detect the sealing of the gas cell to ensure that there is no gas leakage affecting the results in high-sensitivity measurements.

[0036] The long optical path gas cell is large in size and not suitable for portable and space-constrained applications. The long optical path short gas cell design aims to reduce the volume of the gas cell while maintaining high sensitivity; the present invention uses a method for making a long optical path short gas cell for CRDS, and the long optical path short gas cell made has high sensitivity; the optical element is installed in the gas chamber, and the mirror surfaces of the reflector and the concave mirror are aligned and stably fixed to increase the optical path; that is, through the multiple reflection mirror design, a long optical path is achieved in a shorter gas cell to improve the detection sensitivity; compared with the traditional long optical path gas cell, the long optical path short gas cell is compact in design and suitable for portable and space-constrained applications; it can be integrated with other detection components to form a miniaturized and portable gas analysis system.

[0037] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for making a long optical path short gas cell for CRDS, characterized in that: The following steps are involved: Step 1: Optical component processing According to the design drawings, use high-precision processing equipment to process optical components, including reflectors and concave mirrors; Step 2: Air Chamber Manufacturing According to the design drawings, the air chamber is manufactured using processing technology to make its internal surface smooth and maintain precise size and shape; Design gas inlets and outlets at both ends and / or sides of the gas chamber, and install gas interfaces and valves to ensure that the gas can enter and discharge smoothly; Step 3: Assembly According to the design drawings, install the optical components in the air chamber, align and stabilize the mirror surfaces of the reflector and concave mirror; Step 4: Beam Adjustment Adjust the direction and focus of the light beam to ensure that the light beam propagates stably and reflects multiple times in the gas chamber.

2. The method for manufacturing a long optical path short gas cell for CRDS according to claim 1, characterized in that: The design drawings include optical design drawings, gas system design drawings and material selection drawings.

3. The method for manufacturing a long optical path short gas cell for CRDS according to claim 2, characterized in that: The optical drawings are made by using computer-aided design software to design an optical system, wherein the optical system design includes optical cavity, mirror arrangement and optical path optimization; Design gas system drawings are made by designing gas inlets and outlets, gas chamber volumes, and gas flow paths; The material selection drawing plans out the selection of high reflectivity lenses and metal or plastic materials with good airtightness.

4. A method for manufacturing a long optical path short gas cell for CRDS according to claim 1, 2 or 3, characterized in that: In the optical element processing of step 1, the high-precision processing equipment includes a CNC machine tool and a laser cutting machine; according to the design drawings, the CNC machine tool and / or the laser cutting machine are used to process the optical elements including the reflector and the concave mirror.

5. A method for manufacturing a long optical path short gas cell for CRDS according to claim 1, 2 or 3, characterized in that: In the step 2 of manufacturing the air chamber, the processing technology includes CNC milling and 3D printing; according to the design drawings, the air chamber is manufactured by CNC milling and / or 3D printing to make its internal surface smooth and maintain precise size and shape.

6. A method for manufacturing a long optical path short gas cell for CRDS according to claim 1, 2 or 3, characterized in that: In the assembly of step three, a high-reflectivity reflector and a concave mirror are installed at both ends of the cavity, and the laser is aligned with the mirror and the concave mirror at one end of the gas pool, so that the laser can enter the cavity and reflect multiple times, which is used to ensure that the light beam can be reflected multiple times in the cavity; according to the design drawings, the optical elements are installed in the gas chamber, and the mirror surfaces of the reflector and the concave mirror are aligned and stably fixed.

7. The method for manufacturing a long optical path short gas cell for CRDS according to claim 6, characterized in that: In the assembly of step three, the angles and positions of the reflector and the concave mirror are adjusted so that the light beam is reflected multiple times in the cavity along an optimized path.

8. The method for manufacturing a long optical path short gas cell for CRDS according to claim 1, characterized in that: In the step 4, an optical property test is added, and the mirror reflectivity of the reflector and the concave mirror and the transmittance of the optical system are tested using standard optical testing equipment.

9. The method for manufacturing a long optical path short gas cell for CRDS according to claim 1, characterized in that: The method for making a long optical path short gas cell for CRDS also includes a sensitivity test; Among them, the sensitivity test uses a standard gas sample of known concentration to verify the sensitivity and detection limit of the gas cell.

10. The method for manufacturing a long optical path short gas cell for CRDS according to claim 1, characterized in that: The method for manufacturing a long optical path short gas cell for CRDS also includes a leak detection for detecting the sealing of the gas cell.

Images