A push-pull switching structure for a photoluminescence spectroscopy microscopy optical path module

Abstract

The present invention discloses a push-pull switching structure for a photoluminescence spectroscopy microscopy optical path module, comprising a fixed block, a movable block, and a push-pull mechanism. The movable block is a magnetic body, one end of which is connected to the mirror frame of a semi-transparent and semi-reflective mirror, and the other end is connected to the push-pull mechanism. Driven by the push-pull mechanism, the fixed block is used to position the semi-transparent and semi-reflective mirror. The fixed block is a piston device, comprising a cavity and a piston body that can reciprocate within the cavity. A strong magnet is provided on the outer wall of the cavity facing the movable block. The piston body is a non-magnetic body. A weak magnet is provided on the side of the piston body facing the movable block. A window is provided on the front end surface of the cavity facing the movable block, and the weak magnet can extend out of the window. An air hole is provided on the rear end surface of the cavity. The push-pull switching structure can greatly reduce vibration during the push-pull process, which is conducive to the long-term maintenance of optical path accuracy. At the same time, it can reduce the external space occupied by the push-pull switching structure, making the entire photoluminescence spectroscopy system more compact and convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of photoluminescence spectrum (PL spectrum) testing, and in particular to a push-pull switching structure for a photoluminescence spectrum microscopic optical path module, which can be used for an integrated microscopic photoluminescence spectrum device. Background Art

[0002] With the advancement of spectral measurement technology and the needs of scientific research, integrated microscopic optical modules have become an indispensable component of PL spectroscopy. The introduction of microscopic optical modules not only enables a smaller laser spot, higher excitation power density, and improved fluorescence signal collection efficiency, but more importantly, it also achieves higher spatial resolution, which is very beneficial for PL measurements of semiconductor micro- and nanostructures.

[0003] Integrated microscope optical modules typically employ two semi-transparent, semi-reflective mirrors, one for directing illumination light into the principal optical axis and the other for directing diffusely reflected light from the sample surface into the CCD for imaging. However, when measuring fluorescence signals from the sample surface, these two semi-transparent, semi-reflective mirrors must be moved apart to minimize signal loss. In actual experiments, this switching operation often requires frequent operation, necessitating the use of a push-pull switching mechanism.

[0004] The conventional push-pull switching structure uses a pull rod to connect the mirror frame of the semi-transparent and semi-reflective mirror. The pull rod extends out of the microscope optical path module so that it can be pushed and pulled from the outside. The semi-transparent and semi-reflective mirror is usually positioned using a slot design. This implementation method has two disadvantages: (1) the pull rod occupies a large horizontal space when pulled out, which is inconvenient in some compact optical path systems; (2) the use of slots for positioning usually generates vibration, which causes the semi-transparent and semi-reflective mirror to move slightly, which is not conducive to the long-term maintenance of optical path accuracy.

[0005] Therefore, how to achieve a compact design of the push-pull switching structure in the photoluminescence spectroscopy microscopy module and reduce the vibration during push-pull positioning is an urgent problem that needs to be solved in the current microscopic photoluminescence spectroscopy measurement technology. Summary of the Invention

[0006] The main purpose of the present invention is to provide a push-pull switching structure for a photoluminescence spectroscopy microscopy optical path module, to achieve a compact design of the push-pull switching structure and to reduce vibration during push-pull positioning.

[0007] To achieve the above-mentioned purpose, the present invention provides a push-pull switching structure for a photoluminescence spectroscopy microscopy optical path module, comprising a fixed block, a movable block and a push-pull mechanism, wherein the movable block is a magnetic body, one end of which is connected to the mirror frame of the semi-transparent and semi-reflective mirror in the photoluminescence spectroscopy microscopy optical path module, and the other end is connected to the push-pull mechanism, and the mirror frame of the semi-transparent and semi-reflective mirror is pushed and pulled under the drive of the push-pull mechanism; the fixed block is used to position the semi-transparent and semi-reflective mirror, which is a piston device, comprising a cavity and a piston body that can reciprocate in the cavity, and a strong magnet is provided on the outer wall surface of the cavity facing the movable block; the piston body is a non-magnetic body, and a weak magnet is provided on the side of the piston body facing the movable block; the cavity is provided with a window on the front end surface facing the movable block, and the weak magnet can extend out of the window, and an air hole is provided on the rear end surface of the cavity.

[0008] When the push-pull mechanism pulls the movable block outward to make it contact with the fixed block, the movable block first contacts the weak magnet and continues to move under the strong attraction of the strong magnet. At the same time, the cushioning effect of the air holes on the rear end of the cavity allows the movable block to slowly adsorb to the strong magnet without causing large vibrations. When the push-pull mechanism pushes the movable block inward, the movable block first separates from the strong magnet. During the separation process, the cushioning effect of the air holes on the rear end of the cavity ensures that the movable block slowly separates without causing large vibrations, and then separates from the weak magnet.

[0009] In the above-mentioned push-pull switching structure for the photoluminescence spectroscopy microscopy optical path module, the piston body is a cylinder, the corresponding cavity is cylindrical, and the air hole is opened on the opposite side of the window; the piston body can also be a section of a ring, such as a quarter of a ring, and the air hole is opened on the adjacent side of the window.

[0010] In the above-mentioned push-pull switching structure for the photoluminescence spectroscopy microscopy optical path module, the piston body needs to be non-magnetic, and can be made of materials such as aluminum; the movable block is magnetic, and can be a magnetic body containing iron, nickel, etc.

[0011] In the above-mentioned push-pull switching structure for the photoluminescence spectroscopy microscopy optical path module, the push-pull mechanism can adopt a hole-type push-pull movable knot or pull rod or flipper, preferably a hole-type push-pull movable knot or flipper, which can reduce the external space occupied by the push-pull switching structure.

[0012] It can be seen from the above technical solution that the present invention has the following beneficial effects:

[0013] 1. The push-pull switching structure for the photoluminescence spectroscopy module provided by the present invention can greatly reduce the vibration during the push-pull process, thereby facilitating the long-term maintenance of the optical path accuracy.

[0014] 2. The push-pull switching structure for the photoluminescence spectroscopy microscopy module provided by the present invention can reduce the external space occupied by the push-pull switching structure, making the entire photoluminescence spectroscopy system more compact and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] To further illustrate the content and features of the present invention, the method of the present invention is described in detail below with reference to the accompanying drawings and implementation examples, wherein:

[0016] Figure 1 Schematic diagram of the push-pull switching structure of the photoluminescence spectroscopy module provided in Example 1 of the present invention;

[0017] Figure 2 Schematic diagram of a push-pull switching structure for a photoluminescence spectroscopy microscopy module provided in Example 2 of the present invention;

[0018] Figure 3 Schematic diagram of the push-pull switching structure of the photoluminescence spectroscopy module provided in Example 3 of the present invention;

[0019] In the figure, 1- cavity, 2- strong magnet, 3- weak magnet, 4- piston body, 5- moving block, 6- push-pull mechanism, 7- air hole. DETAILED DESCRIPTION

[0020] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in combination with specific implementation cases and with reference to the accompanying drawings.

[0021] Example 1

[0022] like Figure 1 As shown, the push-pull switching structure for the photoluminescence spectroscopy microscopy optical path module provided in this embodiment includes a fixed block, a movable block 5 and a push-pull mechanism 6, wherein one end of the movable block 5 is connected to the mirror frame of the semi-transparent and semi-reflective mirror in the photoluminescence spectroscopy microscopy optical path module, and the other end is connected to the push-pull mechanism 6, which pushes and pulls the mirror frame of the semi-transparent and semi-reflective mirror under the drive of the push-pull mechanism 6; the fixed block is used to fix the mirror frame of the semi-transparent and semi-reflective mirror, which is a piston device, including a cavity 1 and a piston body 4 that can reciprocate in the cavity 1, and a strong magnet 2 is provided on the outer wall surface of the cavity 1 facing the movable block 5; the piston body 4 is a non-magnetic body (such as an aluminum block), and a weak magnet 3 is provided on the side of the piston body 4 facing the movable block 5; a window is provided on the front end surface of the cavity 1, and the weak magnet 3 extends out of the window; an air hole 7 is provided on the rear end surface of the cavity 1.

[0023] In this embodiment, the cavity 1 is cylindrical, the piston body 4 is cylindrical, the front end of the cavity 1 is open, and the weak magnet 3 extends outward from the front end of the cavity 1; an air hole 7 is provided at the rear end of the cavity 1; and the push-pull mechanism 6 utilizes a hole-type push-pull movable joint. When the movable block 5 is pulled outward by the push-pull mechanism 6, the movable block 5 moves toward the fixed block, first contacting the weak magnet 3, and then continues to move outward under the strong attraction of the strong magnet 2. At the same time, the cushioning effect of the air hole 7 allows the movable block 5 to slowly attract the strong magnet 2 without causing significant vibration.

[0024] When the movable block 5 is pushed inward by the push-pull mechanism 6, it first separates from the strong magnet 2. During the separation process, the cushioning effect of the air hole 7 ensures a slow separation without causing large vibrations, and then separates from the weak magnet 3.

[0025] Example 2

[0026] like Figure 2 As shown, the push-pull switching structure for the photoluminescence spectroscopy microscopy optical path module of this embodiment is basically the same as that of embodiment 1, except that the push-pull mechanism 6 adopts a pull rod.

[0027] Example 3

[0028] like Figure 3 As shown, the working mechanism of the push-pull switching structure for the photoluminescence spectroscopy microscopy optical path module of this embodiment is the same as that of embodiment 1, except that:

[0029] 1. The shape of the piston body 4 is a section of a circular ring (the longitudinal section is as follows Figure 3 The arc shape shown in the figure), for example, a quarter of a circle, the inner shape of the cavity 1 matches it, and an air hole is provided on the bottom surface of the cavity 1;

[0030] 2. The push-pull mechanism 6 is a flipper, which can reduce the external space occupied by the push-pull switching structure compared to a pull rod.

[0031] The specific implementation cases described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above is only a specific implementation case of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A push-pull switching structure for a photoluminescence spectroscopy microscopy optical path module, comprising a fixed block, a movable block and a push-pull mechanism, wherein: The movable block is a magnetic body containing iron and / or nickel, one end of which is connected to the mirror frame of the semi-transparent and semi-reflective mirror in the photoluminescence spectroscopy microscope optical path module, and the other end is connected to a push-pull mechanism, which pushes and pulls the mirror frame of the semi-transparent and semi-reflective mirror under the drive of the push-pull mechanism. The push-pull mechanism is a hole-type push-pull movable knot, or a pull rod, or a flipper; the fixed block is used to position the semi-transparent and semi-reflective mirror, which is a piston device, including a cavity and a piston body that can reciprocate in the cavity, and a strong magnet is provided on the outer wall of the cavity facing the movable block; the piston body is a non-magnetic body, and a weak magnet is provided on the side of the piston body facing the movable block; the cavity is provided with a window on the front end face facing the movable block, and the weak magnet can extend out of the window, and an air hole is provided on the rear end face of the cavity.

2. The push-pull switching structure according to claim 1, characterized in that: The piston body is cylindrical, the corresponding cavity is cylindrical, and the air hole is opened on the opposite side of the window.

3. The push-pull switching structure according to claim 1, wherein: The piston body is a section of a circular ring.

4. The push-pull switching structure according to claim 3, characterized in that: The piston body is a quarter of a ring, and the air hole is opened on the adjacent side of the window.

5. The push-pull switching structure according to claim 1, characterized in that: The piston body is an aluminum block.

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