Miniaturized electric field probe based on back detection suspension light power system

Abstract

The miniaturized electric field probe comprises a transparent glass cavity, a metal sleeve, a protective cover, an ultraviolet transparent window and an integrated circular tube, the transparent glass cavity is provided with a containing cavity, one end of the transparent glass cavity is open, a hole is formed in the outer side of the cavity wall, the ultraviolet transparent window is embedded in the hole, and the metal sleeve is sleeved with the protective cover. The laser support is used for observing laser support; a first groove is formed in the open end of the transparent glass cavity, one end of the protective cover is embedded in the first groove and matched with the first groove, and a space defined by the protective cover and the transparent glass cavity is a sealed space; a first through hole and a second through hole are formed in the protective cover in the axial direction, the metal sleeve is inserted into the first through hole and communicates with the containing cavity of the transparent glass cavity, and the sealed space is vacuumized through the metal sleeve; and the integrated circular tube is inserted into the second through hole and is communicated with the accommodating cavity of the transparent glass cavity for capturing laser alignment. According to the invention, capturing, moving and sensing of particles can be realized without introducing mechanical contact and friction.

Description

Technical Field

[0001] This invention belongs to the field of electric field sensing technology, and in particular relates to a miniaturized electric field probe based on a back-probe levitation optical force system. Background Technology

[0002] In the field of micro- and nano-scale detection, non-contact, high-precision measurement technologies are constantly pushing the boundaries of life sciences, materials physics, and precision engineering. Traditional scanning probe technologies rely on physical contact probes, which often face inherent challenges such as significant mechanical interference, easy sample damage, and limited environmental adaptability when applied to live biological samples, extreme environments, or scenarios requiring ultra-high sensitivity force measurements.

[0003] Because the suspended nanoparticles of the optical levitation system are essentially isolated from energy exchange with the external environment, its motion can be approximated as that of an ideal simple harmonic oscillator. Furthermore, due to the ultra-high sensitivity, non-contact nature, and miniaturization potential of optical levitation systems, they have been widely used in recent years for basic physics verification, high-precision weak force sensing, and precise physical measurement.

[0004] In summary, there is an urgent need to design a measurement device based on a suspended optical system that can capture, move, and sense particles without introducing mechanical contact and friction. Summary of the Invention

[0005] To address the aforementioned technical problems in existing technologies, this invention provides a miniaturized electric field probe based on a back-probe levitation optical force system.

[0006] The technical solution adopted in this invention is: A miniaturized electric field probe based on a back-probe levitation optical system is characterized by comprising a transparent glass cavity (1), a metal sleeve (2), a protective cover (3), an ultraviolet transparent window (4), and an integrated circular tube (6). The transparent glass cavity (1) has a cavity to accommodate the cavity and is open at one end. A hole is opened on the outer side of the cavity wall. The ultraviolet transparent window (4) is embedded in the hole for observation and laser propulsion. A first groove (12) is provided at the open end of the transparent glass cavity (1). One end of the protective cover (3) is embedded in the first groove (12) and fits into the first groove (12). The space enclosed by the protective cover (3) and the transparent glass cavity (1) is a sealed space. The protective cover (3) has a first through hole and a second through hole along the axial direction. The metal sleeve (2) is inserted into the first through hole and communicates with the receiving cavity of the transparent glass cavity (1). The sealed space is evacuated to a vacuum through the metal sleeve (2). The integrated round tube (6) is inserted into the second through hole and communicates with the receiving cavity of the transparent glass cavity (1) to capture laser collimation.

[0007] Furthermore, a cuboid groove (11) is provided at the top of the transparent glass cavity (1) to reserve the expandability of the subsequent circuit detection module and to assist the laser support.

[0008] Furthermore, a rubber ring (5) is provided between the transparent glass cavity (1) and the protective cover (3). A second groove (13) is provided on both sides of the opening end of the transparent glass cavity (1) corresponding to the position of the first groove. The rubber ring (5) is placed in the second groove (13) to ensure that the transparent glass cavity and the protective cover are completely sealed.

[0009] Furthermore, the metal sleeve (2) is a thin metal tube that is thicker at the top and narrower at the bottom. The thick end is connected to a ferrule connector to connect to a vacuum pump, which is used to evacuate the transparent glass cavity to a vacuum state; the thin end is connected to the sealed space.

[0010] Furthermore, the integrated circular tube (6) includes a glass sleeve (63), inside which an aspherical single lens (61), a window (62) and a fiber optic lens group (64) are arranged sequentially from head to tail. The aspherical single lens (61) is installed at the head of the glass sleeve (63) for focusing the captured laser. The window (62) is fixedly installed inside the glass sleeve (63) for isolating the vacuum environment.

[0011] Furthermore, the window panel (62) is fixed by an automatic glue applicator.

[0012] Furthermore, the fiber optic lens group (64) serves as an internal collimator, with one end inserted into the glass sleeve (63) for capturing laser collimation.

[0013] The workflow of this invention is as follows: 1. Connect a compression fitting to the thick end of the metal sleeve and connect it to a vacuum pump to evacuate the sealed space formed by the protective cover and the small transparent glass cavity into a vacuum state; 2. The laser beam enters through the integrated circular tube, and after passing through the internal collimator, window, and aspherical single lens, it is focused and captured in a vacuum environment to capture microparticles; 3. The captured particles can be observed through a UV transparent window.

[0014] Compared with the prior art, the beneficial effects of the present invention are reflected in: 1. This invention provides a rubber ring between the protective cover and the transparent glass cavity. After vacuuming, the rubber ring will be squeezed and deformed by the air pressure, thereby blocking the connection between the protective cover and the transparent glass cavity that may leak air. At this time, the protective cover will be firmly attracted to the small transparent glass cavity and completely sealed.

[0015] 2. The present invention utilizes light to manipulate tiny objects, which has become a powerful tool that can capture, move, and sense particles without introducing mechanical contact and friction.

[0016] 3. The present invention adopts a coaxial back-facing optical design, which allows the probe to complete the detection from only one side of the object being tested. This solves the technical problem that traditional transmission probes require optical paths on both sides and cannot be used for detection inside opaque substrates or encapsulated structures, thus greatly expanding its application range.

[0017] 4. The advantage of this invention lies in its compact size and portability. The probe is so light that it can be easily held with one hand, completely eliminating the dependence of traditional detection systems on fixed optical platforms and complex debugging. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2a This is a bottom view of the transparent glass cavity of the present invention with its opening facing downwards.

[0020] Figure 2b This is a front view of the transparent glass cavity of the present invention with its lateral opening facing left.

[0021] Figure 2c This is a front view of the transparent glass cavity of the present invention with the opening facing downwards.

[0022] Figure 3 The diagram shown is a schematic of the integrated circular tube structure of the invention. Detailed Implementation

[0023] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0025] The present invention will now be described in detail with reference to the accompanying drawings and exemplary embodiments.

[0026] A miniaturized electric field probe based on a back-probe levitation optical system is characterized by comprising a transparent glass cavity 1, a metal sleeve 2, a protective cover 3, an ultraviolet transparent window 4, and an integrated circular tube 6. The transparent glass cavity 1 has a cavity to accommodate the cavity and is open at one end. A hole is formed on the outer side of the cavity wall. The ultraviolet transparent window 4 is embedded in the hole for observation and laser propagation. A first groove 12 is provided at the open end of the transparent glass cavity 1. One end of the protective cover 3 is embedded in the first groove 12 and fits into the first groove 12. The space enclosed by the protective cover 3 and the transparent glass cavity 1 is a sealed space. The protective cover 3 has a first through hole and a second through hole along the axial direction. The metal sleeve 2 is inserted into the first through hole and communicates with the receiving cavity of the transparent glass cavity 1. The sealed space is evacuated to a vacuum through the metal sleeve 2. The integrated round tube 6 is inserted into the second through hole and communicates with the receiving cavity of the transparent glass cavity 1 to capture laser collimation.

[0027] Specifically, the transparent glass cavity requires sharp, blunt cuts, no burrs, a smooth surface, and overall transparency. The metal sleeve requires all surfaces to be mechanically polished to a smooth finish, integrally machined, and vacuum ultrasonically cleaned.

[0028] In one embodiment, a cuboid groove 11 is formed at the top of the transparent glass cavity 1 to reserve the expandability of subsequent circuit detection modules and to assist in laser support.

[0029] In one embodiment, an adhesive ring 5 is provided between the transparent glass cavity 1 and the protective cover 3. The two sides of the opening end of the transparent glass cavity 1 are respectively provided with second grooves 13 corresponding to the positions of the first groove. The adhesive ring 5 is disposed in the second grooves 13 to ensure a complete seal between the transparent glass cavity and the protective cover.

[0030] Specifically, during use, a rubber ring 5 is placed at the connection between the protective cover and the small transparent glass cavity. The protective cover 3 and the small transparent glass cavity 1 are bonded together externally with adhesive strips. The sealed space enclosed by the protective cover and the small transparent glass cavity is evacuated to a vacuum through a metal sleeve. When the external adhesive strip is torn off, the rubber ring will be squeezed and deformed due to air pressure, thereby blocking any possible air leakage at the connection between the protective cover and the small transparent glass cavity. At this time, the protective cover will be firmly attracted to the small transparent glass cavity and completely sealed.

[0031] In one embodiment, the metal sleeve 2 is a thin metal tube that is thicker at the top and narrower at the bottom. The thicker end is connected to a ferrule connector to connect to a vacuum pump for evacuating the transparent glass cavity to a vacuum state; the thinner end is connected to the sealed space.

[0032] In one embodiment, the metal sleeve 2 has no variation in thickness and is a shortened version of the metal sleeve to further reduce the probe volume. It can be selected according to the actual situation during use.

[0033] In one embodiment, the integrated circular tube 6 includes a glass sleeve 63, inside which an aspherical single lens 61, a window 62, and a fiber optic lens group 64 are arranged sequentially from head to tail. The aspherical single lens 61 is installed at the head of the glass sleeve 63 for focusing the captured laser; the window 62 is fixedly installed inside the glass sleeve 63 for isolating the vacuum environment.

[0034] In one embodiment, the window slat 62 is fixed by an automatic glue applicator.

[0035] In one embodiment, the fiber optic lens group 64 serves as an internal collimator, with one end inserted into the glass sleeve 63 for capturing laser collimation.

[0036] The workflow of this invention is as follows: 1. Connect a compression fitting to the thick end of the metal sleeve and connect it to a vacuum pump to evacuate the sealed space formed by the protective cover and the small transparent glass cavity into a vacuum state; 2. The laser beam enters through the integrated circular tube, and after passing through the internal collimator, window, and aspherical single lens, it is focused and captured in a vacuum environment to capture microparticles; 3. The captured particles can be observed through a UV transparent window.

[0037] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A miniaturized electric field probe based on a back-probe levitation optical force system, characterized in that, The device includes a transparent glass cavity (1), a metal sleeve (2), a protective cover (3), an ultraviolet transparent window (4), and an integrated round tube (6). The transparent glass cavity (1) has a cavity to accommodate the cavity and is open at one end. A hole is opened on the outer side of the cavity wall. The ultraviolet transparent window (4) is embedded in the hole for observation and laser support. The open end of the transparent glass cavity (1) is provided with a first groove (12). One end of the protective cover (3) is embedded in the first groove (12) and fits into the first groove (12). The space enclosed by the protective cover (3) and the transparent glass cavity (1) is a sealed space. The protective cover (3) has a first through hole and a second through hole along the axial direction. The metal sleeve (2) is inserted into the first through hole and communicates with the receiving cavity of the transparent glass cavity (1). The sealed space is evacuated to a vacuum through the metal sleeve (2). The integrated round tube (6) is inserted into the second through hole and communicates with the receiving cavity of the transparent glass cavity (1) to capture laser collimation.

2. The miniaturized electric field probe based on a back-probe levitation optical force system as described in claim 1, characterized in that, A rectangular groove (11) is provided at the top of the transparent glass cavity (1) to reserve the expandability of the subsequent circuit detection module and the auxiliary laser support.

3. A miniaturized electric field probe based on a back-probe levitation optical system as described in claim 1, characterized in that, A rubber ring (5) is provided between the transparent glass cavity (1) and the protective cover (3). A second groove (13) is provided on both sides of the opening end of the transparent glass cavity (1) corresponding to the position of the first groove. The rubber ring (5) is placed in the second groove (13) to ensure that the transparent glass cavity and the protective cover are completely sealed.

4. A miniaturized electric field probe based on a back-probe levitation optical force system as described in claim 1, characterized in that, The metal sleeve (2) is a thin metal tube that is thicker at the top and narrower at the bottom. The thick end is connected to a VRC connector to connect to a vacuum pump, which is used to evacuate the transparent glass cavity to a vacuum state; the thin end is connected to the sealed space.

5. A miniaturized electric field probe based on a back-probe levitation optical force system as described in claim 1, characterized in that, The integrated circular tube (6) includes a glass sleeve (63). Inside the glass sleeve (63), an aspherical single lens (61), a window (62), and a fiber optic lens group (64) are arranged sequentially from head to tail. The aspherical single lens (61) is installed at the head of the glass sleeve (63) and is used to focus the captured laser. The window (62) is fixedly installed inside the glass sleeve (63) and is used to isolate the vacuum environment.

6. A miniaturized electric field probe based on a back-probe levitation optical force system as described in claim 5, characterized in that, The window panel (62) is fixed by an automatic glue applicator.

7. A miniaturized electric field probe based on a back-probe levitation optical force system as described in claim 5, characterized in that, The fiber optic lens group (64) serves as an internal collimator, with one end inserted into the glass sleeve (63) for capturing laser collimation.

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