Light path adjusting device for laser deflection three-dimensional sound field tomography experiment tool

Abstract

The utility model relates to the field of laser deflection three-dimensional sound field tomography. The utility model relates to an optical path adjusting device, in particular to an optical path adjusting device for a laser deflection three-dimensional sound field tomography experiment tool. According to the light path adjusting device for the laser deflection three-dimensional sound field tomography experiment tool, the distance between the collimating lens and the focusing lens and the distance between the attenuation lens and the focusing lens are adjusted through the connecting assembly, and one of the collimating lenses of different models is selected to be rotated to be coaxial with the focusing lens through the rotating assembly; therefore, light beams with different sizes can be finally formed and emitted into the water tank, and requirements of experiments under different conditions are met.

Description

Technical Field

[0001] This utility model relates to the field of laser deflection three-dimensional acoustic field tomography. More specifically, this utility model relates to an optical path adjustment device for an experimental fixture used in laser deflection three-dimensional acoustic field tomography. Background Technology

[0002] Laser-deflected three-dimensional acoustic field tomography is based on the principle of light deflection in an acoustic field. Combined with tomographic imaging methods, it reconstructs the tomographic plane of the acoustic field under test. By combining surface scanning and rotational scanning, it simultaneously acquires images of the light spot on the projection plane. It comprehensively analyzes the morphological characteristics of the light spot (spot shape, length in each direction) and light intensity distribution information. During the integration process along the beam propagation direction, a weighting factor extracted from the light intensity distribution is added to enhance the weight of acousto-optic interaction on the tomographic plane in the detected information, thereby optimizing the spatial resolution of the measurement.

[0003] In laser deflection tomography (LDT) experiments, ultrasonic transducers are required to generate ultrasonic waves. For example, Chinese invention patent application number 2019111187724 discloses a detection device for a focused ultrasonic focal acoustic wave structure. The laser emitted by the laser can be directed into a water tank, passing through the transducer to generate a sound field center, and then through the water tank to be identified by a photoelectric detection circuit. The optical signal of the beam is then converted into an electrical signal. This scheme can be applied to laser deflection tomography experimental fixtures. However, in this scheme, the relative positions of the laser, transducer, and photoelectric detection circuit are fixed, the path of the beam in the detection device is fixed, and the size of the laser emitted by the laser is fixed. In actual use, it cannot be adjusted accordingly as needed, making it difficult to meet the requirements of laser deflection tomography experiments. Utility Model Content

[0004] The purpose of this invention is to provide an optical path adjustment device for a laser deflection three-dimensional acoustic field tomography experimental fixture. By adjusting the distance between the collimating lens, the attenuating lens and the focusing lens through the connecting components, and by rotating the rotating components to rotate one of multiple collimating lenses of different models to be coaxial with the focusing lens, it is possible to ultimately form beams of different sizes that can be injected into the water tank to meet the experimental needs under different conditions.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: An optical path adjustment device for a laser deflection three-dimensional acoustic field tomography experimental fixture includes a connecting component, and a focusing lens, a collimating lens and an attenuating lens arranged coaxially in sequence. The focusing lens is coaxially arranged at the emitting end of the laser of the laser deflection three-dimensional acoustic field tomography experimental fixture. The collimating lens and the attenuating lens are both connected to the connecting component. The connecting component drives the collimating lens and the attenuating lens to move closer to or away from the focusing lens.

[0006] Furthermore, in the optical path adjustment device for a laser deflection three-dimensional acoustic field tomography experimental fixture, the connecting component includes:

[0007] Adjust the guide rail, which is coaxially arranged with the focusing lens;

[0008] The slider has a through groove at its lower end that corresponds to the adjustment guide rail, and is slidably mounted on the adjustment guide rail through the through groove. The collimating lens and the attenuating lens are both mounted at the upper end of the slider.

[0009] The positioning bolt is provided on the slider and has a threaded hole that communicates with the through groove. The positioning bolt is threadedly installed in the threaded hole.

[0010] Furthermore, in the optical path adjustment device for a laser deflection three-dimensional acoustic field tomography experimental fixture, the connecting component further includes:

[0011] A connecting plate, wherein the adjusting guide rail is disposed on the upper end of the connecting plate, and the upper end of the connecting plate is provided with distance scale lines along the axial direction of the focusing lens;

[0012] A positioning indicator is disposed on the slider, with its lower end extending downward above the distance scale line.

[0013] Furthermore, in the optical path adjustment device for a laser deflection three-dimensional acoustic field tomography experimental fixture, the connecting component further includes:

[0014] A connecting seat is disposed on the upper end of the slider, and both the collimating lens and the attenuating lens are disposed on the upper end of the connecting seat.

[0015] Furthermore, the optical path adjustment device for a laser deflection three-dimensional acoustic field tomography experimental fixture further includes:

[0016] A rotating assembly is disposed on the upper end of the connecting seat. Multiple collimating lenses are configured and all connected to the rotating assembly. The multiple collimating lenses are evenly distributed on the same circumference. Any one of the collimating lenses can be rotated to be coaxial with the focusing lens and the attenuating lens.

[0017] Furthermore, in the optical path adjustment device for a laser deflection three-dimensional acoustic field tomography experimental fixture, the rotating component includes:

[0018] A turntable is vertically arranged along the axis of the focusing lens, and a plurality of the collimating lenses are evenly distributed along the axis on the turntable;

[0019] The base is located on the upper end of the connecting seat. The upper end of the base is provided with a mounting groove corresponding to the turntable. Light-transmitting holes are provided on both sides of the notch. The turntable is rotatably disposed in the notch and can drive any of the collimating lenses to rotate until the two light-transmitting holes are coaxial.

[0020] Furthermore, the optical path adjustment device for a laser deflection three-dimensional acoustic field tomography experimental fixture further includes:

[0021] The protective cover is detachably provided at the end of the focusing lens that is away from the turntable, which is the light outlet and the light transmission hole.

[0022] Furthermore, in the optical path adjustment device for a laser deflection three-dimensional acoustic field tomography experimental fixture, a positioning cross is provided in the middle of the protective cover.

[0023] The beneficial effects of this utility model are:

[0024] 1. The optical path adjustment device of this utility model is coaxially arranged with a focusing lens, multiple collimating lenses and attenuating lenses. The distance between the collimating lens and the attenuating lens and the focusing lens is adjusted by the connecting component. Furthermore, the multiple collimating lenses of different models are rotated one by one to be coaxial with the focusing lens by the rotating component, so that beams of different sizes can be formed and injected into the water tank to meet the needs of experiments under different conditions.

[0025] 2. In the optical path adjustment device of this utility model, by setting position scale lines, when different collimating lenses are rotated to be coaxial with the focusing lens and the attenuating lens, the positioning indicator points to different positions on the position scale lines, thereby realizing fast and accurate adjustment when changing collimating lenses.

[0026] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the laser deflection three-dimensional acoustic field tomography experimental fixture described in this utility model;

[0028] Figure 2 This is a schematic diagram of the optical path adjustment device described in this utility model;

[0029] Figure 3 This is a side view of the optical path adjustment device described in this utility model;

[0030] Figure 4 This is a schematic diagram of the structure of the rotating component described in this utility model.

[0031] The reference numerals in the attached figures are as follows:

[0032] Laser 1; Water tank 2; Signal receiver 3; Transducer 4; Position adjustment mechanism 5; Lens group 6; Connecting seat 601; Focusing lens 602; Collimating lens 603; Attenuating lens 604; Turntable 605; Base 606; Protective cover 607; Connecting assembly 7; Adjusting guide rail 701; Slider 702; Positioning bolt 703; Connecting plate 704; Position scale line 705; Positioning indicator 706; Height adjustment mechanism 8. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0034] It should be noted that in the description of this utility model, the terms "horizontal", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] Figures 2-4 An optical path adjustment device for a laser-deflected three-dimensional acoustic field tomography experimental fixture provided in this embodiment of the present invention includes a connecting component 7 and a focusing lens 602, a collimating lens 603, and an attenuating lens 604 arranged coaxially in sequence. The focusing lens 602 is coaxially arranged at the emitting end of the laser 1 of the laser-deflected three-dimensional acoustic field tomography experimental fixture. The collimating lens 603 and the attenuating lens 604 are both connected to the connecting component 7. The connecting component 7 drives the collimating lens 603 and the attenuating lens 604 to move closer to or further away from the focusing lens 602.

[0036] In this embodiment, the experimental fixture used for laser deflection three-dimensional acoustic field tomography is, for example... Figure 1As shown, the setup includes a laser 1, a lens group 6, a water tank 2, a transducer 4, and a signal receiver 3. The laser 1, water tank 2, and signal receiver 3 are arranged sequentially along the X-axis. The transducer 4 is located inside the water tank 2, and its height can be adjusted by a height adjustment mechanism 8 to extend into the water tank 2 and generate a sound field. When the two sets of position adjustment mechanisms 5 work with the laser deflection three-dimensional acoustic field tomography experimental fixture of the scanning experimental device, the laser 1 emits a laser beam. After the laser beam emitted by the laser 1 is processed by the lens group 6, it can form beams of different sizes that enter the water tank 2. The beam passes through the center of the sound field generated by the transducer 4, then through the water tank 2, and is recognized by the signal receiver 3. The optical signal of the beam is converted into an electrical signal, which can then be transmitted to a designated data processor for further processing. During this process, the position adjustment mechanisms 5 drive the laser 1 and the lens group 6 to move up, down, and translate, allowing the beam emitted by the laser 1 to move throughout the entire sound field, thereby increasing the detection range. When different lenses are used in lens group 6, the distance between lens group 6 and laser 1 needs to be adjusted. At this time, lens group 6 can move relative to laser 1 in the X direction and is connected and fixed to position adjustment mechanism 5 through connecting component 7, thereby realizing the adjustment of the distance between lens group 6 and laser 1. The two sets of position adjustment mechanisms 5 work synchronously, driving laser 1 and signal receiver 3 to move respectively, and always keeping them coaxial in the X direction.

[0037] In this embodiment, the focusing lens 602 in the optical path adjustment device is used to converge the light emitted by the laser 1 to its focal point, and the collimating lens 603 can further adjust the light converged by the focusing lens 602 into parallel light. By selecting appropriate focusing lenses 602 and collimating lenses 603, beams of different sizes can be formed. When using different types of collimating lenses 603, it is necessary to adjust the distance between the focusing lens 602 and the collimating lens 603, so that beams of different sizes can be formed in the end.

[0038] Preferably, in another embodiment of the present invention, the connecting component 7 includes:

[0039] Adjust the guide rail 701, which is coaxially arranged with the focusing lens 602;

[0040] The slider 702 has a through groove at its lower end that corresponds to the adjustment guide rail 701, and is slidably mounted on the adjustment guide rail 701 through the through groove. The collimating lens 603 and the attenuating lens 604 are both mounted on the upper end of the slider 702.

[0041] The positioning bolt 703 is provided on the slider 702, which has a threaded hole communicating with the through groove, and the positioning bolt 703 is threadedly installed in the threaded hole.

[0042] In this embodiment, the positioning bolt 703 is loosened outward so that it does not abut against the adjusting guide rail 701. At this time, the slider 702 can move along the X direction on the adjusting guide rail 701 to adjust the position of the lens group 6. The positioning bolt 703 is tightened inward until it abuts against the adjusting guide rail 701, fixing the slider 702 and the adjusting guide rail 701. At this time, the position of the lens group 6 is fixed.

[0043] Preferably, in another embodiment of the present invention, the connecting component 7 further includes:

[0044] The connecting plate 704, the adjusting guide rail 701 is disposed on the upper end of the connecting plate 704, and the upper end of the connecting plate 704 is provided with distance scale lines along the axial direction of the focusing lens 602;

[0045] A positioning indicator 706 is disposed on the slider 702, with its lower end extending downward above the distance scale line.

[0046] In this embodiment, when different collimating lenses 603 are rotated to be coaxial with the focusing lens 602 and the attenuating lens 604, the distance between the collimating lens 603 and the focusing lens 602 needs to be adjusted accordingly. Therefore, a position scale line 705 is set. Different positions on the position scale line 705 correspond to different models of focusing lenses 602. When different collimating lenses 603 are rotated to be coaxial with the focusing lens 602 and the attenuating lens 604, when the slider 702 is moved to the distance corresponding to the positioning indicator 706 and the collimating lens 603, the positioning indicator 706 points to the position corresponding to the collimating lens 603 on the position scale line 705, which facilitates the rapid adjustment of the position of the collimating lens 603.

[0047] Preferably, in another embodiment of the present invention, the connecting component 7 further includes:

[0048] A connecting base 601 is disposed on the upper end of the slider 702, and both the collimating lens 603 and the attenuating lens 604 are disposed on the upper end of the connecting base 601.

[0049] Preferably, as another embodiment of the present invention, it further includes:

[0050] A rotating assembly is disposed on the upper end of the connecting seat 601. Multiple collimating lenses 603 are configured and all connected to the rotating assembly. The multiple collimating lenses 603 are evenly distributed on the same circumference. Any one of the collimating lenses 603 can be rotated to be coaxial with the focusing lens 602 and the attenuating lens 604.

[0051] In this embodiment, a rotating assembly is provided to facilitate the replacement of different models of collimating lenses 603. Multiple collimating lenses 603 of different models are respectively connected to the rotating assembly. The rotating assembly can drive any collimating lens 603 to rotate to be coaxial with the focusing lens 602 and the attenuating lens 604.

[0052] Preferably, as another embodiment of this utility model, such as Figure 4 As shown, the rotating assembly includes:

[0053] A turntable 605 is vertically arranged along the axis of the focusing lens 602, and a plurality of collimating lenses 603 are evenly distributed along the axis on the turntable 605.

[0054] The base 606 is disposed on the upper end of the connecting seat 601. The upper end of the base 606 is provided with a mounting groove corresponding to the turntable 605. Light-transmitting holes are provided on both sides of the notch. The turntable 605 is rotatably disposed in the notch and can drive any of the collimating lenses 603 to rotate to the coaxiality of the two light-transmitting holes.

[0055] In this embodiment, by rotating the turntable 605, different collimating lenses 603 can be rotated between the two light-transmitting holes, so that the collimating lens 603 is coaxial with the focusing lens 602 and the attenuating lens 604.

[0056] Preferably, as another embodiment of the present invention, it further includes:

[0057] The protective cover 607 is detachably provided at the end of the light outlet of the focusing lens 602 and the end of the light transmission hole away from the turntable 605.

[0058] In this embodiment, a protective cover 607 is detachably provided at the end of the focusing lens 602 that is away from the turntable 605, where both the light outlet and the light transmission hole are located. This protects the lens. The protective cover 607 can be covered when the equipment is not in use, and removed when the equipment needs to be used.

[0059] Preferably, in another embodiment of the present invention, the protective cover 607 has a positioning cross in the middle.

[0060] In this embodiment, a positioning cross is provided in the middle of the protective cover 607 for initial optical positioning.

[0061] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and embodiments shown and described herein.

Claims

1. An optical path adjustment device for a laser-deflected three-dimensional acoustic field tomography experimental fixture, characterized in that, include: Connection components; A focusing lens, a collimating lens, and an attenuating lens are arranged coaxially in sequence. The focusing lens is coaxially positioned at the laser emitting end of the laser in the laser deflection three-dimensional acoustic field tomography experimental fixture. The collimating lens and the attenuating lens are both connected to the connecting assembly. The connecting assembly moves the collimating lens and the attenuating lens closer to or further away from the focusing lens.

2. The optical path adjustment device for a laser deflection three-dimensional acoustic field tomography experimental fixture as described in claim 1, characterized in that, The connection component includes: Adjust the guide rail, which is coaxially arranged with the focusing lens; The slider has a through groove at its lower end that corresponds to the adjustment guide rail, and is slidably mounted on the adjustment guide rail through the through groove. The collimating lens and the attenuating lens are both mounted at the upper end of the slider. The positioning bolt is provided on the slider and has a threaded hole that communicates with the through groove. The positioning bolt is threadedly installed in the threaded hole.

3. The optical path adjustment device for a laser deflection three-dimensional acoustic field tomography experimental fixture as described in claim 2, characterized in that, The connection component also includes: A connecting plate, wherein the adjusting guide rail is disposed on the upper end of the connecting plate, and the upper end of the connecting plate is provided with distance scale lines along the axial direction of the focusing lens; A positioning indicator is disposed on the slider, with its lower end extending downward above the distance scale line.

4. The optical path adjustment device for a laser deflection three-dimensional acoustic field tomography experimental fixture as described in claim 2, characterized in that, The connection component also includes: A connecting seat is disposed on the upper end of the slider, and both the collimating lens and the attenuating lens are disposed on the upper end of the connecting seat.

5. The optical path adjustment device for a laser deflection three-dimensional acoustic field tomography experimental fixture as described in claim 4, characterized in that, Also includes: A rotating assembly is disposed on the upper end of the connecting seat. Multiple collimating lenses are configured and all connected to the rotating assembly. The multiple collimating lenses are evenly distributed on the same circumference. Any one of the collimating lenses can be rotated to be coaxial with the focusing lens and the attenuating lens.

6. The optical path adjustment device for a laser deflection three-dimensional acoustic field tomography experimental fixture as described in claim 5, characterized in that, The rotating component includes: A turntable is vertically arranged along the axis of the focusing lens, and a plurality of the collimating lenses are evenly distributed along the axis on the turntable; The base is located on the upper end of the connecting seat. The upper end of the base is provided with a mounting groove corresponding to the turntable. Light-transmitting holes are provided on both sides of the mounting groove. The turntable is rotatably disposed in the mounting groove and can drive any of the collimating lenses to rotate to be coaxial with the two light-transmitting holes.

7. The optical path adjustment device for a laser deflection three-dimensional acoustic field tomography experimental fixture as described in claim 6, characterized in that, Also includes: The protective cover is detachably provided at the end of the focusing lens that is away from the turntable, which is the light outlet and the light transmission hole.

8. The optical path adjustment device for a laser deflection three-dimensional acoustic field tomography experimental fixture as described in claim 7, characterized in that, The protective cover has a positioning cross in the middle.

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