A laser collimation measurement master

Abstract

The utility model discloses a kind of laser collimation measurement host computers, including host computer box, laser, optical path switching mechanism and liquid calibration component.Laser is fixed in host computer box and emits laser beam;Optical path switching mechanism is movably arranged in host computer box, with working position and calibration position.When in working position, optical path switching mechanism avoids laser beam, so that laser beam directly passes through exit window and emits;When in calibration position, optical path switching mechanism intercepts laser beam and introduces it into liquid calibration component, and projects to horizontal calibration window after deflecting.The utility model uses the physical level characteristics of liquid as optical reference, calibrates by directly quoting working laser beam through optical path switching, reduces the assembly error of traditional bubble level, significantly improves the leveling accuracy and measurement reliability of instrument.

Description

Technical Field

[0001] This utility model relates to the field of optical measurement, specifically to a laser collimation measurement host. Background Technology

[0002] Laser collimators (or laser levelers, laser line projectors) are widely used in construction, equipment installation, and engineering supervision. As a precision instrument, its main function is to establish horizontal or vertical baselines. In these engineering fields, accurate baselines are crucial for ensuring construction quality and the accuracy of equipment installation. Deviations in the baseline directly affect construction quality and equipment installation precision. Therefore, the instrument's main unit needs to be leveled before measurement operations.

[0003] In existing technologies, instrument leveling typically relies on an externally mounted bubble level (commonly known as a bubble level). This is a traditional mechanical leveling method widely used in many optical measuring instruments. Its working principle is based on the buoyancy of the bubble in the liquid; when the instrument is level, the bubble will be located in the center of the bubble tube. The operator judges whether the instrument is level by visually observing the position of the bubble. In addition, some instruments may incorporate simple adjustment devices, such as screw adjustment mechanisms, to assist in adjusting the instrument's levelness. These adjustment devices allow for fine-tuning within a certain range to achieve a state closer to level.

[0004] However, this traditional mechanical leveling method has significant drawbacks. Firstly, its accuracy is limited. Due to the curvature radius and volume limitations of the bubble tube, the bubble level has low sensitivity, making it difficult to detect minute tilts, and parallax easily occurs when visually judging the bubble's centering position. Secondly, there are assembly errors (axis system errors). Because the bubble level is mounted as an independent component on the instrument casing, during the manufacturing and assembly process, it is often difficult to ensure that the geometric axis of the bubble level is perfectly parallel to the optical axis of the internal laser. This means that even if the bubble is centered, the laser beam may still have a slight tilt. Moreover, once the bubble and laser are found to be non-parallel, users often find it difficult to calibrate it themselves and need to return it to the manufacturer for repair. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a laser collimation measurement host.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: This utility model provides a laser collimation measurement host, including: A main unit box is used to be installed on an adjustable support. The main unit box has an exit window at the front end and a horizontal calibration window at the rear end. A laser, fixedly installed inside the main unit box, is used to emit a laser beam in the direction of the emission window; An optical path switching mechanism, movably disposed within the main unit box, is used to change the propagation path of the laser beam; and, A liquid calibration component is located inside the main unit housing; The optical path switching mechanism has a working position and a calibration position. When in the working position, the optical path switching mechanism avoids the laser beam, allowing the laser beam to pass directly through the exit window in a straight line. When in the calibration position, the optical path switching mechanism intercepts the laser beam and introduces the laser beam into the liquid calibration component. The beam, after being deflected by the liquid calibration component, is then projected onto the horizontal calibration window.

[0007] In some embodiments, the optical path switching mechanism includes a control lever, a first reflector, and a second reflector. The control lever passes through a perforation in the top of the main unit and is slidably mounted up and down. The first reflector is mounted on the lower end of the control lever. The second reflector is mounted on the inner top surface of the main unit and is located above the first reflector. When the control lever slides upward to the calibration position, the first reflector enters the main optical path of the laser.

[0008] In some embodiments, the liquid calibration assembly includes a transparent container fixedly disposed within the main unit housing; the transparent container is located between the first reflector and the second reflector at the calibration position; the transparent container is filled with a transparent liquid, and a gas space is left above the transparent liquid, and the transparent liquid forms a free liquid surface as a horizontal reference in a static state.

[0009] In some embodiments, both the first reflector and the second reflector are 45-degree reflectors; When the main unit is in a horizontal position, the calibration optical path is configured such that: a horizontally incident laser beam is reflected by the first reflector into a vertically upward beam, the vertically upward beam passes through the transparent liquid and the free liquid surface in sequence, and is reflected by the second reflector into a horizontally backward beam, which is finally projected onto the horizontal calibration window located at the rear end of the main unit.

[0010] In some embodiments, the optical path switching mechanism further includes a magnetic positioning component, which includes a first magnetic block and a second magnetic block disposed on the control rod, and a first magnetic plate and a second magnetic plate disposed correspondingly on the inner wall or fixed plate of the main unit box. When the control lever slides to the working position, the second magnetic block and the second magnetic plate are attracted to each other; when the control lever slides to the calibration position, the first magnetic block and the first magnetic plate are attracted to each other.

[0011] In some embodiments, a fixing plate is also fixedly connected inside the main unit box, and the second magnetic plate is disposed on the fixing plate to limit the downward travel of the control lever and provide lower stop point positioning.

[0012] In some embodiments, a guide groove is provided axially at the center or sidewall of the control rod, and a guide rod is also provided between the control rod and the main unit box; the guide rod is fixed inside the main unit box and slidably inserted into the guide groove; the guide rod is used to limit the rotation of the control rod around its axis and keep the optical axis direction of the first reflector constant.

[0013] In some embodiments, a translucent frosted glass is installed at the horizontal calibration window, and crosshairs or concentric circle targets are etched on the translucent frosted glass to indicate the offset of the beam center.

[0014] In some embodiments, the top of the control lever extending from the top of the main unit box is provided with an operating handle for the operator to manually pull or press to switch the working mode.

[0015] In some embodiments, the bottom of the main unit box is provided with a threaded connection hole adapted to a tripod, the threaded connection hole being used to connect with a tripod head with a three-axis fine-tuning screw.

[0016] Compared with existing technologies, the beneficial effects of the laser collimation measurement host provided by this utility model are as follows: Through the coordinated work of the host box, laser, optical path switching mechanism, and liquid calibration component, the laser collimation measurement host achieves both calibration and operational modes. The optical path switching mechanism allows the laser beam to have different propagation paths in different modes, avoiding the problems of low accuracy and large assembly errors found in traditional bubble levels. The liquid calibration component utilizes the physical leveling properties of liquid as an optical reference, directly referencing the working laser beam for calibration, avoiding errors caused by the non-parallelism of the bubble level's own axis, and improving leveling accuracy. The magnetic positioning component and guiding mechanism ensure the stability and accuracy of the optical path switching mechanism during movement, ensuring the reliability and practicality of the entire measurement host. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a laser collimation measurement host provided in one embodiment of the present invention; Figure 2 yes Figure 1 A schematic diagram of the internal cross-sectional structure of the laser collimation measurement host when it is in the calibration position; Figure 3 yes Figure 1 A schematic diagram of the internal cross-sectional structure of the laser collimation measurement host when it is in the working position; Figure 4 yes Figure 1 A schematic diagram of the structure of the adjusting support.

[0018] Explanation of reference numerals in the attached drawings: 1. Main unit box; 11. Exit window; 12. Horizontal calibration window; 13. Threaded connection hole; 14. Fixing plate; 2. Laser; 3. Optical path switching mechanism; 31. Control rod; 311. Guide groove; 312. Operating handle; 32. First reflector; 33. Second reflector; 34. Magnetic positioning assembly; 341. First magnetic block; 342. Second magnetic block; 343. First magnetic plate; 344. Second magnetic plate; 35. Guide mechanism; 351. Guide rod; 4. Liquid calibration assembly; 5. Adjustment support. Detailed Implementation

[0019] The technical solutions in the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. The described embodiments are only possible technical implementations of this utility model, but are not limited thereto. Other embodiments obtained by those skilled in the art in conjunction with the embodiments of this utility model without creative effort are also within the protection scope of this utility model.

[0020] This application mainly uses optical path switching to achieve laser collimation measurement host leveling, which avoids the error caused by the non-parallelism of the bubble level's own axis system and improves the leveling accuracy. The following is a further detailed description of this application.

[0021] Please refer to Figure 1 The laser collimation measurement host provided in this application includes a host box 1, a laser 2, an optical path switching mechanism 3, and a liquid calibration component 4. The host box 1 is used to be installed on the adjustment support 5, the laser 2 is fixed inside the host box 1, the optical path switching mechanism 3 is movably disposed inside the host box 1, and the liquid calibration component 4 is disposed inside the host box 1. By changing the different states of the optical path switching mechanism 3, the laser beam propagation path can be changed to realize two modes: calibration and operation, which ensures measurement accuracy and reduces assembly error.

[0022] Please refer to Figure 1 and Figure 2Specifically, the main unit 1 includes a front-end exit window 11 and a rear-end horizontal calibration window 12. The exit window 11 is typically a transparent structure, made of glass or high-strength transparent plastic, with good light transmittance to ensure the laser beam can exit smoothly. The exit window 11 is generally circular or square in shape and is tightly connected to the front end of the main unit 1, for example, by using a sealing strip to prevent dust and moisture from entering the main unit 1. The horizontal calibration window 12 is also a transparent structure, which can be made of semi-transparent frosted glass or a photosensitive receiving screen, requiring the material to clearly display the spot projected by the laser beam. Crosshairs or concentric circle targets are etched on the horizontal calibration window 12; these markings are used to indicate the offset of the beam center. The horizontal calibration window 12 is installed at the rear end of the main unit 1, and the connection method can be embedded installation to ensure its positional stability. The bottom of the main unit box 1 is provided with a threaded connection hole 13 adapted for tripods. This threaded connection hole 13 can be connected to a tripod head with a three-axis fine adjustment screw to achieve stable installation of the main unit box 1 on the tripod. The threaded connection hole 13 is characterized by having a standard thread specification to ensure a tight fit with the threads of the tripod head.

[0023] Please refer to Figure 2 Specifically, laser 2 includes a laser emitting device and a fixing structure. The laser emitting device is the core component of laser 2, and it can be of different types, such as a semiconductor laser or a solid-state laser, capable of stably emitting a laser beam. The laser emitting device typically consists of components such as a laser diode and an optical lens. The laser diode generates the laser beam, and the optical lens focuses and collimates the laser beam to ensure its quality. The fixing structure is used to secure the laser emitting device inside the main unit box 1. It can be a metal or plastic bracket, which is tightly connected to the mounting position inside the main unit box 1 using bolts or clips to ensure that laser 2 does not shake during operation.

[0024] Please refer to Figure 2 and Figure 3 Specifically, the optical path switching mechanism 3 includes a control rod 31, a first reflector 32, a second reflector 33, a magnetic positioning component 34, and a guide mechanism 35.

[0025] The control lever 31 is a rod-shaped structure that can slide up and down, with a guide groove 311 axially formed in its center or side wall. The control lever 31 can be made of metal or high-strength plastic, possessing a certain degree of strength and rigidity. An operating handle 312 is located at the top of the control lever 31 extending beyond the top of the main unit box 1. The operating handle 312 can be a round or square handle, facilitating manual pulling or pressing by the operator to switch operating modes. The operating handle 312 and the control lever 31 can be connected by integral molding or by a threaded connection.

[0026] The first reflector 32 is mounted on the lower end of the control lever 31, and the second reflector 33 is mounted on the inner top surface of the main unit box 1, above the first reflector 32. Both are 45-degree reflectors. The 45-degree reflector is characterized by its surface forming a 45-degree angle with the horizontal plane, enabling it to reflect a horizontally incident laser beam as a beam pointing vertically upwards or horizontally backwards. The reflectors can be made of glass or metal, and their surfaces undergo high-precision polishing to ensure optimal reflection.

[0027] The magnetic positioning assembly 34 includes a first magnetic block 341 and a second magnetic block 342 disposed on the control lever 31, and a first magnetic plate 343 and a second magnetic plate 344 disposed on the inner wall of the main unit box 1 or the fixing plate 14 respectively. The magnetic blocks and magnetic plates are typically made of permanent magnet materials. When the control lever 31 slides to the working position, the second magnetic block 342 and the second magnetic plate 344 are attracted together; when the control lever 31 slides to the calibration position, the first magnetic block 341 and the first magnetic plate 343 are attracted together, thereby locking the control lever 31 in the corresponding position through magnetic attraction.

[0028] The guiding mechanism 35 includes a guide rod 351, which is fixed inside the main unit box 1 and slidably inserted into the guide groove 311. The guide rod 351 restricts the rotation of the control rod 31 around its axis, keeping the optical axis direction of the first reflector 32 constant. The guide rod 351 can be made of metal or plastic, with a smooth surface to reduce friction with the guide groove 311.

[0029] Please refer to Figure 2 and Figure 3 Specifically, the liquid calibration component 4 includes a transparent container and a transparent liquid. The transparent container, located between the first reflector 32 and the second reflector 33 at the calibration position, is made of a transparent material, such as glass or transparent plastic, possessing good light transmittance and sealing properties. It can hold the transparent liquid, but the container is not completely filled with liquid; a gas space is left above the liquid to ensure that the liquid can flow freely and form a free liquid surface that is always perpendicular to the direction of gravity when the container is tilted. The transparent container can be cylindrical or cuboid in shape, with its internal space used to fill the transparent liquid. The transparent liquid is typically a liquid with good optical properties, such as silicone oil, which naturally forms a free liquid surface as a horizontal reference when at rest. This property of the liquid naturally forming an absolutely horizontal surface when at rest serves as an optical horizontal reference.

[0030] Please refer to Figure 2 , Figure 3 and Figure 4When the main unit 1 is mounted on the tripod, in working mode, the operator presses down on the operating handle 312, causing the control lever 31 to move downwards. The second magnetic block 342 engages with the second magnetic plate 344, locking the control lever 31 in the working position. At this time, the first reflector 32 moves downwards with the control lever 31, completely avoiding the main optical path of the laser 2. The beam emitted by the laser 2 passes directly through the front exit window 11 in a straight line (the control lever 31 is positioned offset from the main optical path to prevent it from blocking the beam), which can be directly used for long-distance engineering measurements. In calibration mode, the operator pulls up on the operating handle 312, causing the control lever 31 to slide upwards. The first magnetic block 341 engages with the first magnetic plate 343, locking the control lever 31 in the calibration position. At this time, the first reflector 32 rises and enters the main optical path of the laser 2. The horizontal beam emitted by the laser 2 is directed towards the first reflector 32 and reflected as a vertically upward beam. It passes through the transparent container and the liquid layer and is directed towards the second reflector 33. It is reflected by the second reflector 33 as a horizontally backward beam and is finally projected onto the horizontal calibration window 12.

[0031] This embodiment utilizes the property of gravity that the liquid surface remains horizontal. When the instrument is tilted, the incident angle of the light beam hitting the liquid surface changes. According to the law of refraction, the outgoing light beam will experience angular deviation or displacement. Therefore, if the main unit 1 is tilted, the light beam will be refracted and deflected when passing through the liquid surface, causing the light spot on the horizontal calibration window 12 to deviate from the center of the crosshair or the center of the concentric circle target. The operator only needs to adjust the fine adjustment screw on the tripod until the light spot is precisely aligned with the center of the mark. At this time, the main unit 1 is adjusted to a horizontal state.

[0032] The implementation principle of this embodiment is as follows: Through the coordinated operation of the main unit 1, laser 2, optical path switching mechanism 3, and liquid calibration component 4, this embodiment achieves both calibration and operational modes for the laser collimation measurement main unit. The design of the optical path switching mechanism 3 allows the laser beam to have different propagation paths in different modes, avoiding the problems of low accuracy and large assembly errors found in traditional bubble levels. The liquid calibration component 4 utilizes the physical leveling properties of liquid as an optical reference, directly referencing the working laser beam for calibration, reducing assembly errors and improving leveling accuracy. The magnetic positioning component 34 and the guiding mechanism 35 ensure the stability and accuracy of the optical path switching mechanism 3 during movement, ensuring the reliability and practicality of the entire measurement main unit.

[0033] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A laser collimation measurement host, characterized in that, include: A main unit box is used to be installed on an adjustable support. The main unit box has an exit window at the front end and a horizontal calibration window at the rear end. A laser, fixedly installed inside the main unit box, is used to emit a laser beam in the direction of the emission window; An optical path switching mechanism is movably installed inside the main unit box to change the propagation path of the laser beam; as well as, A liquid calibration component is located inside the main unit housing; The optical path switching mechanism has a working position and a calibration position. When in the working position, the optical path switching mechanism avoids the laser beam, allowing the laser beam to pass directly through the exit window in a straight line. When in the calibration position, the optical path switching mechanism intercepts the laser beam and introduces the laser beam into the liquid calibration component. The beam, after being deflected by the liquid calibration component, is then projected onto the horizontal calibration window.

2. The laser collimation measurement host according to claim 1, characterized in that, The optical path switching mechanism includes a control rod, a first reflector, and a second reflector. The control rod passes through a perforation in the top of the main unit box and is slidably mounted up and down. The first reflector is mounted on the lower end of the control rod. The second reflector is mounted on the inner top surface of the main unit box and is located above the first reflector. When the control lever slides upward to the calibration position, the first reflector enters the main optical path of the laser.

3. The laser collimation measurement host according to claim 2, characterized in that, The liquid calibration component includes a transparent container, which is fixedly installed inside the main unit box. The transparent container is located between the first reflector and the second reflector at the calibration position. The transparent container is filled with a transparent liquid, and a gas space is left above the transparent liquid. The transparent liquid forms a free liquid surface as a horizontal reference when it is stationary.

4. The laser collimation measurement host according to claim 3, characterized in that, Both the first and second reflectors are 45-degree reflectors; When the main unit is in a horizontal position, the calibration optical path is configured such that a horizontally incident laser beam is reflected by the first reflector into a vertically upward beam. The vertically upward beam passes through the transparent liquid and the free liquid surface in sequence, and is then reflected by the second reflector into a horizontally backward beam, which is finally projected onto the horizontal calibration window located at the rear end of the main unit.

5. The laser collimation measurement host according to claim 2, characterized in that, The optical path switching mechanism also includes a magnetic positioning component, which includes a first magnetic block and a second magnetic block disposed on the control rod, and a first magnetic plate and a second magnetic plate disposed on the inner wall or fixed plate of the main unit box. When the control lever slides to the working position, the second magnetic block and the second magnetic plate are attracted to each other; when the control lever slides to the calibration position, the first magnetic block and the first magnetic plate are attracted to each other.

6. The laser collimation measurement host according to claim 5, characterized in that, A fixing plate is also fixedly connected inside the main unit box. The second magnetic plate is disposed on the fixing plate to limit the downward travel of the control rod and provide the lower stop point positioning.

7. The laser collimation measurement host according to claim 2, characterized in that, The control rod has a guide groove axially formed at its center or on its side wall, and a guide rod is also provided between the control rod and the main unit box; the guide rod is fixed inside the main unit box and slidably inserted into the guide groove; the guide rod is used to limit the rotation of the control rod around its axis and keep the optical axis direction of the first reflector constant.

8. The laser collimation measurement host according to claim 1, characterized in that, A semi-transparent frosted glass is installed at the horizontal calibration window. Crosshairs or concentric circle targets are etched on the semi-transparent frosted glass to indicate the offset of the beam center.

9. The laser collimation measurement host according to claim 2, characterized in that, The control lever extends from the top of the main unit box and has an operating handle at its top, which allows the operator to manually pull or press to switch working modes.

10. The laser collimation measurement host according to claim 1, characterized in that, The bottom of the main unit box is provided with a threaded connection hole adapted to a tripod, which is used to connect with a tripod head with a three-axis fine adjustment screw.

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