CN108613967B - A Raman Spectroscopy System - Google Patents

Abstract

The optical path switching device is characterized in that it comprises a pump (10), a storage container (50), a conveying pipeline (31), a transparent device (52) made of a transparent material, a valve (F), a No. 1 balance airbag (41), No. 2 balance airbag (42), liquid metal (Y); a Raman optical detection system for environmental protection or food or jewelry or metal, characterized in that it has the aforementioned optical path switching device. The invention does not need to be re-adjusted after the light path switching is realized, and the abnormal state of the light source can be found quickly and in real time.

Description

A Raman Spectroscopy System

technical field

The invention relates to the field of optics, in particular to a Raman spectrum testing system.

Background technique

The Raman system can obtain the molecular structure information of the substance by acquiring the Raman scattering spectrum of the substance composition.

The current Raman spectroscopy measurement is performed by placing the sample to be measured on the Raman-enhanced chip, such as coating the liquid to be measured, and after it is naturally dried, it is placed at the front end of a Raman microscope or an ordinary Raman spectrometer for measurement. Obtain the substance composition and content in the tested sample.

However, the inventor found that the existing Raman test system is difficult to quickly verify the laser light source. When the laser of the Raman test system suddenly has problems during continuous testing, the problem of the light source cannot be known in real time, which may lead to test errors.

SUMMARY OF THE INVENTION

In order to solve the aforementioned technical problems, the present invention designs an optical path switching device, a Raman optical detection system for environmental protection or food or jewelry or metal.

Technical content 1. An optical path switching device, characterized in that it includes a pump (10), a storage container (50), a conveying pipe (31), a transparent device (52) made of a transparent material, a valve (F), a No. 1 balance airbag (41), No. 2 balance airbag (42), liquid metal (Y);

The transparent device (52) has a first surface plane and a second surface plane, and the first surface plane of the transparent device is parallel to the second plane surface of the transparent device;

The transparent device has a cavity (53);

The cavity of the transparent device has a first cavity surface plane and a second cavity surface plane, and the first cavity surface plane of the cavity of the transparent device is parallel to the second cavity surface plane of the cavity of the transparent device;

The first surface plane of the transparent device and the first cavity surface plane of the cavity of the transparent device are parallel to each other;

The accommodating cavity (51) of the storage container (50) is communicated with the No. 1 balance air bag (41), and plays the role of balancing the air pressure;

The cavity (53) of the transparent device is communicated with the No. 2 balance air bag (42), which plays the role of balancing the air pressure;

The inlet of the pump (10) communicates with the bottom of the accommodating cavity (51) of the storage container (50);

The outlet of the pump (10) communicates with the cavity (53) of the transparent device;

When the transparent device needs to be used as a reflector, the valve (F) is turned off first, and then the pump (10) is started to transport the liquid metal (Y) into the cavity (53) of the transparent device (52), so that the transparent device becomes into a reflector;

When the transparent device needs to be used as a light-transmitting mirror, the valve (F) is opened first, and the liquid metal (Y) flows into the accommodating cavity (51) of the storage container (50) under the action of gravity, so that the transparent device loses its filling. becomes transparent.

Technical content 2. The optical path switching device according to technical content 1, characterized in that: the material of the transparent device is quartz.

Technical content 3. The optical path switching device according to technical content 1, characterized in that the storage container (50) is made of glass.

Technical content 4. The optical path switching device according to technical content 1, characterized in that: the material for making the conveying pipe (31) is glass.

Technical content 5. The optical path switching device according to technical content 1, characterized in that: the manufacturing material of the No. 1 balance airbag (41) is rubber.

Technical content 6. The optical path switching device according to technical content 1, characterized in that: the second balance airbag (42) is made of rubber.

Technical content 7. The optical path switching device according to technical content 1, characterized in that the liquid metal (Y) is mercury.

Technical content 8. The optical path switching device according to technical content 1, characterized in that the valve (F) adopts electromagnetic control.

The Raman optical detection system for environmental protection or food or jewelry or metal is characterized in that it has the above-mentioned optical path switching device.

The optical system is characterized by having the aforementioned optical path switching device.

Description of technical content and beneficial effects of technical content.

The present invention does not need to move, disassemble or rotate solid-state components when switching between reflective and non-reflective states, because the present invention does not need to be re-adjusted after switching the optical path, can quickly switch the optical path, and can be used in various optical systems. The present invention can also be used in Raman spectroscopy detection systems.

The invention can also be used to switch the light of the laser in the optical system to the detection device to realize the detection of the light of the light source, and can quickly switch to the test state after the light source is verified.

Description of drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention, and the current state of the transparent device 52 is transparent. 21 is a laser, 22 is a laser beam, 23 is a beam of 22 that enters the transparent device (52), and 24 is an outgoing beam of 23 that exits the transparent device.

FIG. 2 is another state of the embodiment of FIG. 1 . The current state of the transparent device 52 is that it has reflective capability. Among them, 22 is the laser beam, 25 is the reflected beam, 98 is the sample to be tested, and 99 is the stage that carries the sample to be tested.

Fig. 3 is an embodiment of the present invention, and Fig. 3 is a Raman spectroscopy test system; the cavity of the No. 1 optical path switching device (1-1) is in a transparent state without being filled with liquid metal, and the No. 1 optical path switching device ( 1-2) The cavity is not filled with liquid metal and is transparent.

Fig. 4 is another state of Fig. 3. The cavity of the No. 1 optical path switching device (1-1) is filled with liquid metal in a reflective state, and the cavity of the No. 1 optical path switching device (1-2) is filled with liquid metal. in a reflective state.

specific embodiment

Embodiment 1. As shown in Figures 1 and 2, the optical path switching device is characterized in that it includes a pump (10), a storage container (50), a conveying pipe (31), a transparent device (52) made of transparent material, and a valve. (F), No. 1 balance airbag (41), No. 2 balance airbag (42), liquid metal (Y);

The transparent device (52) has a first surface plane and a second surface plane, and the first surface plane of the transparent device is parallel to the second plane surface of the transparent device;

The transparent device has a cavity (53);

The cavity of the transparent device has a first cavity surface plane and a second cavity surface plane, and the first cavity surface plane of the cavity of the transparent device is parallel to the second cavity surface plane of the cavity of the transparent device;

The first surface plane of the transparent device and the first cavity surface plane of the cavity of the transparent device are parallel to each other;

The accommodating cavity (51) of the storage container (50) is communicated with the No. 1 balance air bag (41), and plays the role of balancing the air pressure;

The cavity (53) of the transparent device is communicated with the No. 2 balance air bag (42), which plays the role of balancing the air pressure;

The inlet of the pump (10) communicates with the bottom of the accommodating cavity (51) of the storage container (50);

The outlet of the pump (10) communicates with the cavity (53) of the transparent device;

When the transparent device needs to be used as a reflector, the valve (F) is turned off first, and then the pump (10) is started to transport the liquid metal (Y) into the cavity (53) of the transparent device (52), so that the transparent device becomes into a reflector;

When the transparent device needs to be used as a light-transmitting mirror, the valve (F) is opened first, and the liquid metal (Y) flows into the accommodating cavity (51) of the storage container (50) under the action of gravity, so that the transparent device loses its filling. becomes transparent.

Embodiment 2, as shown in Figures 3 and 4, a Raman spectrum testing system, including 21 is a laser (laser), 1-1 is the first optical path switching device, and 1-2 is the second optical path switching device , 90 is the optical shaper, 91 and 92 are the lens groups used to change the spot size, 93 is the first reflector, 94 is the second reflector, 96 is the third reflector, and 100 is the fourth reflector Mirror, 95 is a dichroic mirror (transmits light with a wavelength greater than the working wavelength, reflects light with a working wavelength), 102 is a filter (filters out the light with a working wavelength), 101 is a convex lens, 97 is an objective lens, CCD For the light collection module, the CCD is used to collect the optical signal collected by the monochromator and sent to the computer.

As shown in Figure 3, in the test mode: the first optical path switching device 1-1 and the second optical path switching device 1-2 are both set to a transparent state (that is, there is no liquid metal filling in the optical path switching device), the laser (21 ) emits a laser (22), and the laser 22 sequentially passes through the first optical path switching device (1-1), the optical shaper (90), the lens group (91, 92), the first reflecting mirror (93), the second No. 1 reflector (94) to dichroic mirror (95), dichroic mirror (95) transmits stray light (22-2) whose wavelength is greater than the working wavelength, stray light (22-2) is discarded, dichroic mirror (95) The test light (22-1) with the working wavelength of the reflection wavelength, the test light (22-1) is projected onto the sample (98) after passing through the third reflector (96), and the test light (22-1) is projected After the sample (98) is on the sample (98), Raman scattering will be generated, and the fingerprint light (80) will be generated. After the fingerprint light (80) is collected by the objective lens (97), it is reflected by the third mirror (96). The dichroic mirror (95) passes through the second optical path switching device (1-2) to the fourth reflector (100), then passes through the filter (102), and then passes through the convex lens (101) into the single-phase mirror (101). Colorimeter, and then the CCD collects the spectral signal of the fingerprint light (80) and transmits it to the computer to realize the Raman spectral analysis of the sample.

As shown in Figure 4, in the verification mode: the first optical path switching device 1-1 and the second optical path switching device 1-2 are both set to the reflective state (that is, the optical path switching device is filled with liquid metal), the laser ( 21) The laser light (22) is emitted, and the laser light (22) passes through the first optical path switching device (1-1), the second optical path switching device (1-2), the fourth reflecting mirror (100), the filter The film (102) and the convex lens (101) enter the monochromator, and then the CCD collects the spectral signal of the laser (22) and transmits it to the computer to realize the analysis of the laser (22) to check the stray light content of the laser (22), so as to Detect the working state of the laser. During continuous testing, a laser detection is performed before each test. If there is a problem with the laser, the problem with the laser can be found in time.

In this embodiment, the state of the laser can be verified in real time, the system does not need to be debugged after switching the mode, and the fast switching between the test mode and the verification mode can be realized.

The wavelength value of the working wavelength of Example 3 and Example 2 is 785 nm.

The application range of the optical path switching device of the present invention is not limited to the Raman spectrum analysis system.

Claims (1)

1. A Raman spectrum testing system, characterized in that: it comprises a laser (21), a No. 1 optical path switching device (1-1), a No. 2 optical path switching device (1-2), an optical shaper (90) , Lens group (91, 92) for changing the spot size, No. 1 mirror (93), No. 2 mirror (94), No. 3 mirror (96), No. 4 mirror (100) , dichroic mirror (95), filter (102), convex lens (101), objective lens (97) and CCD; CCD is a light acquisition module, and the CCD is used to collect optical signals collected by a monochromator and sent to the computer; The first optical path switching device (1-1) and the second optical path switching device (1-2) are both optical path switching devices; The optical path switching device comprises a pump (10), a storage container (50), a conveying pipeline (31), a transparent device (52) made of a transparent material, a valve (F), a No. 1 balance air bag (41), a No. 2 balance air bag ( 42), liquid metal (Y); The transparent device (52) has a first surface plane and a second surface plane, and the first surface plane of the transparent device is parallel to the second plane surface of the transparent device; The transparent device has a cavity (53); The cavity of the transparent device has a first cavity surface plane and a second cavity surface plane, and the first cavity surface plane of the cavity of the transparent device is parallel to the second cavity surface plane of the cavity of the transparent device; The first surface plane of the transparent device and the first cavity surface plane of the cavity of the transparent device are parallel to each other; The accommodating cavity (51) of the storage container (50) is communicated with the No. 1 balance air bag (41), and plays the role of balancing the air pressure; The cavity (53) of the transparent device is communicated with the No. 2 balance air bag (42), which plays the role of balancing the air pressure; The inlet of the pump (10) communicates with the bottom of the accommodating cavity (51) of the storage container (50); The outlet of the pump (10) communicates with the cavity (53) of the transparent device; When the transparent device needs to be used as a reflector, the valve (F) is turned off first, and then the pump (10) is started to transport the liquid metal (Y) into the cavity (53) of the transparent device (52), so that the transparent device becomes into a reflector; When the transparent device needs to be used as a light-transmitting mirror, the valve (F) is opened first, and the liquid metal (Y) flows into the accommodating cavity (51) of the storage container (50) under the action of gravity, so that the transparent device loses its filling. become transparent; In the test mode: set the first optical path switching device (1-1) and the second optical path switching device (1-2) to the transparent state, the laser (21) emits the laser (22), and the laser (22) is in turn After the No. 1 optical path switching device (1-1), the optical shaper (90), the lens group (91, 92), the No. 1 reflecting mirror (93), the No. 2 reflecting mirror (94) to the dichroic mirror (95), the dichroic mirror (95) transmits stray light (22-2) with a wavelength greater than the working wavelength, the stray light (22-2) is discarded, and the dichroic mirror (95) reflects the test light of the working wavelength ( 22-1), the test light (22-1) is projected onto the sample (98) after passing through the third reflector (96), the sample (98) after the test light (22-1) is projected on the sample (98) Raman scattering will be generated, and fingerprint light (80) will be generated. After the fingerprint light (80) is collected by the objective lens (97), it is reflected by the third reflector (96) and reaches the dichroic mirror (95), and then passes through the third mirror (96). The No. 2 optical path switching device (1-2) reaches the No. 4 reflecting mirror (100), then passes through the filter (102), and then enters the monochromator through the convex lens (101), and then the CCD collects the fingerprint light ( 80) The spectral signal is sent to the computer to realize the Raman spectral analysis of the sample; In the verification mode: the first optical path switching device (1-1) and the second optical path switching device (1-2) are both set to the reflective state, that is, the optical path switching device is filled with liquid metal, and the laser (21) emits The laser (22) and the laser (22) pass through the first optical path switching device (1-1), the second optical path switching device (1-2), the fourth reflecting mirror (100), and the filter (102) in sequence , the convex lens (101) enters the monochromator, and then the CCD collects the spectral signal of the laser (22) and transmits it to the computer to realize the analysis of the laser (22) to check the stray light content of the laser (22) to detect the work of the laser Status, during continuous testing, a laser inspection is performed before each test. If there is a problem with the laser, the problem with the laser can be found in time.

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