Raman industrial probe

Abstract

The invention discloses a Raman industrial probe, which relates to the technical field of Raman spectrum analysis and mainly comprises an inner body, a fastening nut and the like. One end of the inner body is provided with a single-hole interface, the other end of the inner body is provided with double holes, the double holes are provided with two FC optical fiber connectors, and the inner body is divided into a left cavity and a right cavity which are parallel to each other. The left cavity is a 785nm laser emitting path and is provided with a lens and a plurality of narrow-band optical filters, so that the laser can be filtered, and the laser purity is improved; the right cavity is a Raman signal return path, a plurality of long-pass optical filters which are arranged in parallel are arranged at one end close to the double-hole interface, a plurality of groups of reflectors are arranged at one end close to the single-hole interface to form an optical path refraction path, and a narrow-band optical filter is arranged between the laser emission path and the signal return path, so that Raman signals can be efficiently collected and purified. The sensitivity and the accuracy of Raman signal detection are improved, the structure is stable, the operation is convenient and fast, and the adaptability is high.

Description

Technical Field

[0001] This invention relates to the technical field of Raman spectroscopy analysis, specifically to an industrial Raman probe. Background Technology

[0002] In numerous fields of industrial production and scientific research, rapid and accurate analysis and detection of the composition and structure of substances are crucial. Raman spectroscopy, as a non-destructive analytical technique, has been widely applied in materials science, chemistry, biomedicine, environmental monitoring, and many other fields due to its ability to provide rich information on molecular vibrations and rotations. As a key component of a Raman spectroscopy analysis system, the performance of the industrial Raman probe directly affects the detection accuracy and reliability of the entire system. However, existing industrial Raman probes suffer from several problems in their design and application.

[0003] From an optical performance perspective, some probes, due to the lack of effective filtering devices during laser emission, result in a large amount of stray light mixed in with the laser, reducing the purity of the laser. This not only affects the interaction between the laser and the sample but also severely interferes with the subsequently received Raman signal, reducing the signal-to-noise ratio and consequently impacting the sensitivity and accuracy of the detection. Furthermore, during the collection and transmission of the Raman signal, some probes lack a properly designed optical path guiding structure, leading to significant signal loss during transmission, low collection efficiency, and an inability to accurately obtain the complete Raman spectral information of the sample.

[0004] In terms of structural stability, existing probes often have poor sealing performance, making them susceptible to external environmental factors. Dust, moisture, and other impurities can easily enter the probe, contaminating and damaging delicate optical components, leading to decreased probe performance or even malfunction. Moreover, the support and fixing structures of some probes are not robust enough, making them prone to shaking and displacement due to vibration, collisions, and other factors during use. This alters the relative positions of the internal optical components, affecting the accuracy and stability of the optical system and shortening the probe's lifespan.

[0005] Furthermore, in terms of ease of operation and adaptability, some probes are not designed with ergonomic principles in mind, making handheld operation inconvenient and causing operator fatigue during prolonged use. Additionally, the probes' interface designs are not flexible enough, making connection and disassembly with external devices difficult, resulting in poor versatility and compatibility, and failing to meet the needs of different application scenarios. Summary of the Invention

[0006] Therefore, the purpose of this invention is to provide a Raman industrial probe to solve the technical problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A Raman industrial probe includes an inner body, one end of which has a single-hole interface and the other end has a double-hole opening. Two FC fiber optic connectors are provided on the double-hole opening. The inner body contains a left cavity and a right cavity. The right cavity contains multiple parallel long-pass filters near the double-hole opening and multiple sets of reflectors near the single-hole interface. The left cavity contains a lens and multiple narrowband filters.

[0008] Preferably, the Raman industrial probe further includes a fastening nut that is threadedly connected to the single-hole interface, and the inner wall of the fastening nut is provided with a sapphire lens and a probe rod.

[0009] Preferably, the end of the probe rod located on the inner wall of the fastening nut is sleeved on the sapphire lens.

[0010] Preferably, the other end of the probe rod is provided with a lens fixing component, one end of the lens fixing component is provided with a rubber ring and a lens, and the outer wall of the lens fixing component is threadedly connected to the other end of the probe rod with a lens seat.

[0011] Preferably, one side of the inner body is provided with a side cover, the outer wall of the inner body is fitted with an outer shell, the other end of the inner body and located at one end of the outer shell is provided with a fixing plate, the outer wall of the fixing plate is provided with a rear shell, and the other end of the rear shell is provided with a light seat.

[0012] Preferably, the left cavity is the path of the 785nm laser.

[0013] Preferably, the right cavity is the return path for the Raman signal.

[0014] Preferably, the multiple sets of the reflectors form an optical refraction path, wherein a narrow-band filter is provided between the path emitted by the 785nm laser and the return path of the Raman signal.

[0015] Preferably, the left cavity and the right cavity are arranged parallel to each other.

[0016] Preferably, the outer shell also has an arc-shaped recessed structure that facilitates handholding.

[0017] In summary, the present invention has the following main beneficial effects: This invention incorporates multiple narrowband filters along the laser emission path in the left cavity to precisely filter the 785nm laser, allowing only specific narrow wavelengths of light to pass through. This effectively filters out stray light of other wavelengths, significantly improving the purity of the laser. This ensures more effective interaction between the laser and the sample, laying the foundation for obtaining high-quality Raman signals. The optical path refraction design, composed of multiple sets of mirrors within the right cavity, precisely guides Raman signal transmission in a predetermined direction, improving signal collection efficiency and reducing signal loss during transmission. Simultaneously, multiple parallel long-pass filters further filter the Raman signal, allowing only light above specific wavelengths to pass through. Furthermore, a narrow-band filter is placed between the laser emission and Raman signal return paths to effectively prevent interference from reflected laser light, further purifying the Raman signal and significantly improving detection sensitivity and accuracy, enabling the acquisition of more accurate and reliable sample Raman spectral information. The fastening nut and single-hole interface are connected by a thread, providing excellent sealing performance and effectively preventing external dust, moisture, and other impurities from entering the probe, protecting the internal precision optical components from contamination and damage. The sapphire lens fitted at one end of the probe rod has high hardness and wear resistance, capable of withstanding certain external impacts, further enhancing the probe's protective capabilities. The rubber ring on the lens holder serves a dual function of buffering and sealing, further improving the probe's sealing and stability, ensuring normal operation in various complex environments. The inner body is encased in an outer shell, which, through the coordinated action of components such as the fixing plate, rear shell, and optical mount, provides stable support and fixation for the inner body. This multi-layered fixing structure effectively reduces the shaking and displacement of the probe caused by vibration, collision, and other factors during use, ensuring the relative positional stability of the internal optical components, guaranteeing the accuracy and stability of the optical system, and improving the reliability and service life of the probe. Attached Figure Description

[0018] Figure 1 This is an isometric schematic diagram of the overall structure of the present invention; Figure 2 This is an exploded view of the overall structure of the present invention; Figure 3 This is a schematic cross-sectional view of the overall structure of the present invention; Figure 4 For the present invention Figure 2 Enlarged view of point B in the middle; Figure 5 For the present invention Figure 3 Enlarged view of point D; Figure 6 For the present invention Figure 2 Enlarged view of point A in the middle; Figure 7 For the present invention Figure 3 Enlarged diagram of point C in the middle.

[0019] Figure descriptions: 10. Inner body; 11. Single-hole interface; 12. Dual-hole port; 13. FC fiber optic connector; 14. Left cavity; 15. Right cavity; 16. Long-pass filter; 17. Reflector; 18. Narrow-band filter; 19. Fastening nut; 20. Sapphire lens; 21. Probe rod; 211. Lens fixing component; 212. Rubber ring; 213. Lens mount; 101. Side cover; 102. Outer shell; 103. Fixing plate; 104. Rear shell; 105. Beam mount. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0021] Example like Figures 1 to 7 As shown, a Raman industrial probe includes an inner body 10. One end of the inner body 10 is provided with a single-hole interface 11, and the other end is provided with a double-hole port 12. Two FC fiber optic connectors 13 are provided on the double-hole port 12. The inner body 10 is provided with a left cavity 14 and a right cavity 15. The right cavity 15 is provided with a plurality of parallel long-pass filters 16 near the end of the double-hole port 12, and a plurality of reflectors 17 near the end of the single-hole interface 11. The left cavity 14 is provided with a lens and a plurality of narrowband filters 18.

[0022] The Raman industrial probe also includes a fastening nut 19 that is threaded to a single-hole interface 11, and the inner wall of the fastening nut 19 is provided with a sapphire lens 20 and a probe rod 21.

[0023] The probe rod 21 is fitted onto the sapphire lens 20 at one end located on the inner wall of the fastening nut 19.

[0024] The other end of the probe rod 21 is provided with a lens fixing component 211. One end of the lens fixing component 211 is provided with a rubber ring 212 and a lens. The outer wall of the lens fixing component 211 is threadedly connected to the other end of the probe rod 21 with a lens seat 213.

[0025] The inner body 10 is also provided with a side cover 101 on one side, and an outer shell 102 is fitted on the outer wall of the inner body 10. A fixing plate 103 is provided at the other end of the inner body 10 and at one end of the outer shell 102. A rear shell 104 is provided on the outer wall of the fixing plate 103, and a light seat 105 is provided at the other end of the rear shell 104.

[0026] The path of the 785nm laser emitted from the left cavity 14.

[0027] The right cavity 15 is the return path for the Raman signal.

[0028] Multiple sets of reflectors 17 form the optical refraction path, and a narrow-band filter 18 is provided between the path emitted by the 785nm laser and the return path of the Raman signal.

[0029] The left cavity 14 and the right cavity 15 are arranged in parallel to each other.

[0030] The outer casing 102 also features a curved recessed structure for easy hand-holding.

[0031] It should be noted that in this embodiment, the inner body 10 serves as the core component, and an outer shell 102 is fitted over its outer wall. The outer shell 102 provides robust outer protection for the entire probe. Simultaneously, through the coordinated action of components such as the fixing plate 103, the rear shell 104, and the optical fiber holder 105, the inner body 10 is stably supported and fixed. This multi-layered fixing structure effectively reduces the shaking and displacement of the probe caused by vibration, collisions, and other factors during use, ensuring the relative positional stability of the internal optical elements. This, in turn, ensures the accuracy and stability of the optical system, improving the reliability and service life of the probe.

[0032] One end has a single-port interface 11, and the other end has a dual-port interface 12. Two FC fiber optic connectors 13 are installed on the dual-port interface 12 for connecting to external fiber optic equipment to achieve optical signal transmission. The interior of the inner body 10 is divided into a left cavity 14 and a right cavity 15, which are arranged parallel to each other.

[0033] Multiple long-pass filters 16 are arranged in parallel near the dual-aperture 12 inside the right cavity 15. These long-pass filters 16 allow light above a certain wavelength to pass through, while reflecting or absorbing light below that wavelength, playing a crucial role in Raman signal processing. Multiple sets of reflectors 17 are arranged near the single-aperture 11. These reflectors 17 are arranged at specific angles and positions to form an optical refraction path, changing the direction of light propagation and guiding the Raman signal through the right cavity 15 along a predetermined path.

[0034] The left cavity 14 serves as the path for the 785nm laser emission and contains lenses and multiple narrowband filters 18. The lenses are used for focusing or collimating the laser, ensuring it is emitted with appropriate beam quality. The narrowband filters 18 precisely allow light of specific narrow wavelengths to pass through, effectively filtering out stray light of other wavelengths and improving laser purity and signal quality. Simultaneously, narrowband filters 18 are also placed between the 785nm laser emission path and the Raman signal return path to further prevent interference between light rays from different paths.

[0035] The fastening nut 19 is threadedly connected to the single-hole interface 11, serving to fix and seal the lens. A sapphire lens 20 and a probe rod 21 are housed on the inner wall of the fastening nut 19. One end of the probe rod 21, located on the inner wall of the fastening nut 19, is fitted with the sapphire lens 20. The sapphire lens 20 possesses excellent properties such as high hardness and high light transmittance, protecting internal optical components while ensuring normal light transmission. The other end of the probe rod 21 has a lens holder 211. One end of the lens holder 211 is equipped with a rubber ring 212 and the lens. The rubber ring 212 serves as a buffer and seal, preventing dust and other impurities from entering. The outer wall of the lens holder 211 is threadedly connected to the other end of the probe rod 21 with a lens seat 213, used to fix and support the lens, ensuring the stability of the lens position.

[0036] A side cover 101 is installed on one side of the inner body 10 to protect internal components and facilitate maintenance. An outer shell 102 is fitted over the outer wall of the inner body 10. The outer shell 102 not only protects the entire probe but also features a curved recessed structure for easy gripping and use. A fixing plate 103 is located at the other end of the inner body 10, adjacent to the outer shell 102. A rear shell 104 is installed on the outer wall of the fixing plate 103, and a light source holder 105 is located at the other end of the rear shell 104 to further fix and support the entire probe structure, while also providing a stable interface for light transmission.

[0037] The working principle of this invention is as follows: The working process of this Raman industrial probe is mainly divided into two stages: laser emission and Raman signal reception.

[0038] During the laser emission phase, a 785nm laser beam is transmitted from an external laser source to the left cavity 14 via optical fiber. The laser beam is first focused or collimated by a lens inside the left cavity 14 to achieve a suitable beam shape and size.

[0039] Multiple narrowband filters 18 are installed within the left cavity 14 to precisely filter the 785nm laser beam along the laser emission path, allowing only light of a specific narrow wavelength band to pass through. This significantly filters out stray light of other wavelengths, greatly improving the purity of the laser. Narrowband filters 18 are also installed between the laser emission path and the Raman signal return path, effectively preventing interference from reflected laser light on the Raman signal, further purifying the Raman signal, and making the acquired Raman spectral information more accurate and reliable.

[0040] Then, the laser passes through multiple narrowband filters 18, which filter the laser, allowing only the 785nm wavelength to pass through, effectively filtering out stray light of other wavelengths and improving the purity of the laser. The processed 785nm laser enters the probe rod 21 through the single-hole interface 11, and after further processing by the sapphire lens 20, it is emitted onto the surface of the sample to be tested.

[0041] During the Raman signal reception stage, when the 785nm laser irradiates the sample, the sample molecules undergo Raman scattering, generating a Raman signal. These Raman signals return in the opposite direction to the laser emission path, first passing through the probe rod 21 and the sapphire lens 20 before entering the right cavity 15. Inside the right cavity 15, the Raman signal first encounters multiple long-pass filters 16. These long-pass filters 16 allow light above a certain wavelength in the Raman signal to pass through, while simultaneously reflecting or absorbing light below that wavelength, further filtering out unwanted light.

[0042] The optical path refraction design, consisting of multiple sets of reflectors 17 within the right cavity 15, is ingeniously designed to precisely guide Raman signal transmission in a predetermined direction, ensuring that the Raman signal reaches subsequent processing components efficiently. This design not only improves signal collection efficiency and reduces signal loss during transmission but also makes the entire optical path layout more compact and rational, saving internal space within the probe. Simultaneously, multiple parallel-arranged long-pass filters 16 further filter the Raman signal, allowing only light above specific wavelengths to pass through, further optimizing signal quality and improving detection sensitivity and accuracy.

[0043] Then, the Raman signal is transmitted in a predetermined direction through a refraction path composed of multiple sets of reflectors 17. During transmission, the Raman signal also passes through a narrow-band filter 18 positioned between the 785nm laser emission path and the Raman signal return path. This narrow-band filter 18 prevents the reflected light from the 785nm laser from interfering with the Raman signal. Finally, the processed Raman signal is transmitted through the FC fiber optic connector 13 on the dual-port 12 to external spectrometers and other equipment for further analysis and processing, thereby obtaining the Raman spectral information of the sample and enabling the analysis of the sample's composition, structure, and other properties.

[0044] The above embodiments are merely illustrative of the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solutions based on the technical concept proposed in this invention shall fall within the scope of protection of this invention.

Claims

1. A Raman industrial probe, characterized in that, The device includes an inner body (10), one end of which is provided with a single-hole interface (11) and the other end with a double-hole opening (12). Two FC fiber optic connectors (13) are provided on the double-hole opening (12). The inner body (10) contains a left cavity (14) and a right cavity (15). The right cavity (15) contains a plurality of parallel long-pass filters (16) near the double-hole opening (12) and a plurality of mirrors (17) near the single-hole interface (11). The left cavity (14) contains a lens and a plurality of narrow-band filters (18).

2. The Raman industrial probe according to claim 1, characterized in that, The Raman industrial probe also includes a fastening nut (19) that is threaded to the single-hole interface (11), and the inner wall of the fastening nut (19) is provided with a sapphire lens (20) and a probe rod (21).

3. The Raman industrial probe according to claim 2, characterized in that, The probe rod (21) is fitted onto the sapphire lens (20) at one end located on the inner wall of the fastening nut (19).

4. The Raman industrial probe according to claim 2, characterized in that, The probe rod (21) is provided with a lens fixing component (211) at the other end. The lens fixing component (211) is provided with a rubber ring (212) and a lens at one end. The lens fixing component (211) has a lens seat (213) threadedly connected to the other end of the probe rod (21).

5. A Raman industrial probe according to claim 1, characterized in that, The inner body (10) is also provided with a side cover (101) on one side, and an outer shell (102) is fitted on the outer wall of the inner body (10). A fixing plate (103) is provided at the other end of the inner body (10) and at one end of the outer shell (102). A rear shell (104) is provided on the outer wall of the fixing plate (103), and a light seat (105) is provided at the other end of the rear shell (104).

6. A Raman industrial probe according to claim 1, characterized in that, The left cavity (14) is the path of the 785nm laser.

7. A Raman industrial probe according to claim 6, characterized in that, The right cavity (15) is the return path for the Raman signal.

8. A Raman industrial probe according to claim 7, characterized in that, Multiple sets of the aforementioned reflectors (17) form an optical refraction path, wherein a narrow-band filter (18) is provided between the path of the 785nm laser and the return path of the Raman signal.

9. A Raman industrial probe according to claim 1, characterized in that, The left cavity (14) and the right cavity (15) are arranged parallel to each other.

10. A Raman industrial probe according to claim 5, characterized in that, The outer shell (102) is also provided with an arc-shaped recessed structure for easy hand holding.

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