Multipurpose laser angle calibration device based on spectroscope

Abstract

The invention relates to the technical field of measuring instruments, in particular to a multipurpose laser angle calibration device based on a spectroscope. According to the technical scheme, the device comprises a base and a laser fixedly installed on the base, and the laser is used for emitting laser beams in the vertical upward direction; the spectroscope is arranged on an emitting light path of the laser, forms a 45-degree included angle with the vertical direction, and is used for dividing a laser beam into a first light beam reflected along the horizontal direction and a transmission light beam vertically transmitted along an original light path. The single laser source is matched with the spectroscope and the prism group, so that the structure is simplified, the cost is reduced, the double beams are strictly coplanar, and the non-coplanar error of the beams is eliminated; the second light beam is driven to sweep by 360 degrees through the rotating part, so that the measurement range covers 0-360 degrees, the angle measurement and multi-direction collimation functions are achieved, and the integration level and the measurement precision of the device are improved.

Description

Technical Field

[0001] This invention relates to the field of measuring instrument technology, and in particular to a multi-purpose laser angle calibration device based on a beam splitter. Background Technology

[0002] Angle measurement and collimation reference are fundamental technical requirements in fields such as machining, construction, instrument calibration, and scientific experiments. Currently, related equipment mainly falls into three categories: first, angle measuring instruments based on dual laser sources, which use two independent laser beams to form an angle for measurement; second, traditional mechanical protractors or optical collimators, which rely on mechanical scales or a single beam to achieve limited functionality; and third, single-laser-source collimation devices, primarily used to provide collimation reference in a single direction. However, existing technologies have the following shortcomings in practical applications:

[0003] While dual-laser source goniometers can measure angles, their core problem lies in the fact that the two laser beams are generated by independent light sources. Affected by factors such as installation accuracy, temperature variations, and mechanical vibrations, it is difficult to ensure that the two beams are strictly aligned on the same horizontal plane, resulting in poor coplanarity and significant measurement errors. Furthermore, the dual-light source structure increases the size and manufacturing cost of the device, and its measurement range is usually limited by the fixed installation angle of the light sources, making it difficult to achieve full-range angle measurement from 0 to 360 degrees, thus restricting its application in multi-directional, large-angle scenarios.

[0004] Traditional mechanical protractors (such as vernier protractors and optical dividing heads) lack collimation capabilities, their measurement accuracy is highly dependent on machining precision, and they are complex to operate, failing to meet the demands for high-precision and high-efficiency measurements. They are particularly unsuitable for large-scale machinery installations or long-distance collimation scenarios. While single-laser collimators can provide high-precision collimated beams, their functionality is limited, they cannot simultaneously perform angle measurements, and they cannot generate a dual-beam angle for multi-directional reference.

[0005] In addition, although the few existing devices that use the principle of beam splitting can achieve beam splitting from a single light source, their beam propagation directions are often not coplanar, or they cannot achieve 360-degree continuous rotation measurement, resulting in a limited measurement range and an inability to take into account the dual functions of angle measurement and multi-directional collimation.

[0006] In summary, existing angle measurement and collimation devices generally suffer from problems such as complex structure, poor beam coplanarity, limited measurement range, and single function, making it difficult to meet the demands of modern industry and scientific research for high-precision, full-range, and multifunctional integrated devices. Therefore, this application proposes a multi-purpose laser angle calibration device based on a beam splitter. Summary of the Invention

[0007] The purpose of this invention is to address the problems of complex structure, poor beam coplanarity, limited measurement range, and single function that exist in existing angle measurement and collimation devices, and to propose a multi-purpose laser angle calibration device based on a beam splitter.

[0008] The technical solution of the present invention: a multi-purpose laser angle calibration device based on a beam splitter, comprising a base and a laser fixedly mounted on the base, the laser being used to emit a laser beam in a vertically upward direction;

[0009] A beam splitter is disposed on the laser emission path at a 45-degree angle to the vertical direction. The beam splitter is used to split the laser beam into a first beam reflected in the horizontal direction and a transmitted beam transmitted vertically along the original optical path.

[0010] A reflector is disposed at a 60-degree angle to the vertical direction in the transmitted light path to reflect the transmitted light beam into a reflected light beam at a 60-degree angle to the vertical direction.

[0011] A right-angled triangular prism, with its inclined surface as the incident surface, is set on the reflected light path to refract the reflected light beam into a second light beam that propagates in the horizontal direction, and the second light beam and the first light beam are located on the same horizontal plane;

[0012] An angle disk is fixedly installed on the base and located in the same horizontal plane. The angle disk has 360-degree continuous scale and is equipped with a horizontal level and a vertical level.

[0013] A rotating component, wherein the reflector and the right-angle prism are fixedly connected to the rotating component;

[0014] A central axis is provided, which is collinear with the emission axis of the laser, and the rotating component is rotatably engaged with the base via the central axis.

[0015] The rotating component is used to rotate 360 ​​degrees around the central axis to drive the second beam to sweep across the angle disk; by reading the angle scale between the first beam and the second beam on the angle disk, angle measurement within the range of 0-360 degrees is realized; the first beam and the second beam simultaneously serve as collimation reference beams at any angle.

[0016] Optionally, the beam splitter is a semi-transparent, semi-reflective beam splitter with a beam splitting ratio of 1:1.

[0017] Optionally, the reflector is a high-reflectivity aluminum film reflector with a reflectivity of not less than 95%.

[0018] Optionally, the right-angle prism has a refractive index of 1.6473, and its bevel angle is set so that the reflected beam is strictly horizontal after refraction.

[0019] Optionally, the scale accuracy of the angle disk is 0.1 degrees, and the scale lines are evenly distributed along the circumference of the disk.

[0020] Optionally, both the horizontal and vertical levels are bubble levels, used to calibrate the horizontal state of the angle disk.

[0021] Optionally, a rolling bearing is provided between the rotating component and the central shaft.

[0022] Optionally, the laser is a semiconductor laser with an output wavelength of 635nm to 670nm and a laser beam divergence angle ≤1mrad.

[0023] Optionally, the base is made of cast iron to provide stable support.

[0024] Optionally, the rotating component is a ring-shaped or disc-shaped structure, and the reflector and the right-angle prism are fixedly arranged along their circumference.

[0025] Compared with the prior art, this application includes at least one of the following beneficial technical effects:

[0026] The design employs a single laser source combined with a beam splitter, replacing the dual laser source solution. This reduces the number of light sources, simplifies the equipment structure, and lowers manufacturing costs.

[0027] By using the angle matching design of the beam splitter, reflector, and right-angle prism, the two horizontal beams are strictly located in the same plane, avoiding the problem of poor beam coplanarity caused by the independent light sources in dual laser source equipment, and reducing the measurement error caused by this.

[0028] The rotating component can drive the second beam to rotate 360 ​​degrees around the central axis, enabling the second beam to complete a full circumference sweep on the angle disk, realizing angle measurement within the range of 0-360 degrees, and solving the problem of limited measurement range of existing equipment.

[0029] The device has both angle measurement and dual-beam collimation functions. Both the first and second beams can be used as collimation reference beams, making it suitable for applications requiring multi-directional collimation without the need to switch between different devices.

[0030] The laser uses a high-collimation semiconductor laser source. After the beam is split, reflected, and refracted, it still maintains its original collimation characteristics, ensuring the accuracy of angle measurement and collimation reference.

[0031] In summary, this invention uses a single laser source in conjunction with a beam splitter and prism assembly, which simplifies the structure and reduces costs while achieving strict coplanarity of the two beams, eliminating beam non-coplanarity errors. By using a rotating component to drive the second beam to sweep 360 degrees, the measurement range covers 0-360 degrees, combining angle measurement and multi-directional collimation functions, thus improving the integration and measurement accuracy of the device. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of a multi-purpose laser angle calibration device based on a beam splitter.

[0033] Figure 2 This is a schematic diagram of the optical path principle of a multi-purpose laser angle calibration device based on a beam splitter.

[0034] Figure 3 This is a schematic diagram of the rotating component structure of a multi-purpose laser angle calibration device based on a beam splitter.

[0035] Reference numerals: 1. Base; 2. Laser; 3. Beam splitter; 401. Reflector; 402. Right-angle prism; 5. Angle disk; 601. Horizontal level; 602. Vertical level; 7. Rotating component; 8. Central axis. Detailed Implementation

[0036] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0037] Example: Figure 1 As shown, a multi-purpose laser angle calibration device based on a beam splitter includes a base 1, a laser 2, a beam splitter 3, a reflector 401, a right-angle prism 402, an angle disk 5, a horizontal level 601, a vertical level 602, a rotating component 7, and a central shaft 8.

[0038] In this embodiment, the base 1 serves as the overall support structure for the device and is made of cast iron to ensure the stability and vibration resistance of the device during use. The laser 2 is fixedly installed at the center of the base 1, and the laser beam is emitted vertically upward. In this embodiment, the laser 2 is a semiconductor laser with an output wavelength of 635nm-670nm and a laser beam divergence angle ≤1mrad to ensure high collimation and stability of the beam.

[0039] like Figure 2As shown, a beam splitter 3 is disposed above the emission optical path of the laser 2, and the beam splitter 3 is fixedly installed at a 45-degree angle to the vertical direction. In this embodiment, the beam splitter 3 is a semi-transparent and semi-reflective beam splitter with a splitting ratio of 1:1, used to divide the vertically upward laser beam into two beams proportionally: one beam is reflected along the horizontal direction to form a first horizontal beam; the other beam is transmitted vertically along the original optical path to form a transmitted beam.

[0040] A reflector 401 is provided in the transmitted light path and is mounted on the rotating component 7 at a 60-degree angle to the vertical direction. In this embodiment, the reflector 401 is a high-reflectivity aluminum film reflector with a reflectivity of not less than 95%, used to reflect the transmitted light beam to form a reflected light beam at a 60-degree angle to the vertical direction.

[0041] like Figure 3 As shown, a right-angled prism 402 is arranged in the reflected light path, and the right-angled prism 402 and the reflector 401 are fixedly connected to the same rotating component 7. The inclined surface of the right-angled prism 402 faces the reflected light beam from the reflector 401, serving as the incident surface. In this embodiment, the refractive index of the right-angled prism 402 is 1.6473, and the reflected light beam, after being refracted by the inclined surface, forms a second horizontal light beam propagating in the horizontal direction. By optimizing the refractive index of the prism and the angle of the inclined surface, it is ensured that the second horizontal light beam and the first horizontal light beam are strictly located in the same horizontal plane.

[0042] Angle disk 5 is fixedly mounted on base 1, located in the same horizontal plane as the first and second horizontal beams. Angle disk 5 has 360-degree continuous graduations with a graduation accuracy of 0.1 degrees, and the graduation lines are evenly distributed along the circumference of the disk. A horizontal level 6 and a vertical level 6 are embedded in angle disk 5. In this embodiment, a bubble level is used to calibrate the horizontal state of angle disk 5.

[0043] like Figure 3 As shown, the rotating component 7 is rotatably coupled to the base 1 via a central shaft 8. The axis of the central shaft 8 is collinear with the emission axis of the laser 2. A rolling bearing is provided between the rotating component 7 and the central shaft 8 to ensure the smoothness and accuracy of the rotation process. The reflector 401 and the right-angle prism 402 are fixedly connected to the rotating component 7, and the rotating component 7 can rotate 360 ​​degrees around the central shaft 8.

[0044] The working process of this device is as follows: First, the angle disk 5 is calibrated to a horizontal state using the horizontal level 6 and the vertical level 6. Then, the laser 2 is activated, emitting a vertically upward laser beam. After the laser beam is split by the beam splitter 3, the first horizontal beam propagates in a fixed direction and serves as a reference collimation beam; the transmitted beam is reflected by the reflector 401 to form a reflected beam, which is then refracted by the right-angle prism 402 to form a second horizontal beam. The second horizontal beam is coplanar with the first horizontal beam.

[0045] Rotating component 7 drives reflector 401 and right-angle prism 402 to rotate around central axis 8, and the second horizontal beam sweeps across angle disk 5 around central axis 8. By reading the angle between the first and second horizontal beams on angle disk 5, angle measurement within the range of 0-360 degrees can be achieved.

[0046] Meanwhile, both the first and second horizontal beams can serve as collimation reference beams at any angle, satisfying multi-directional collimation requirements. The two beams are located on the same horizontal plane, ensuring the accuracy of angle measurements.

[0047] It is worth noting that this invention, through a single laser source combined with a beam splitter, avoids the need for two independent emission components required by dual-laser-source solutions, reducing the number of optical components and assembly complexity, thereby simplifying the overall structure of the device and lowering manufacturing costs. In terms of optical path principle, the vertical beam emitted by the laser is split by a 45-degree beam splitter, forming a horizontally reflected beam as a fixed reference. The transmitted light is then reflected by a mirror at a 60-degree angle to the vertical direction and refracted by a right-angle prism. By setting the mirror angle and the prism refractive index, the final emitted second beam is ensured to be strictly on the same horizontal plane as the first beam. This eliminates the problem of non-coplanar beams caused by installation errors or temperature changes in dual independent light sources, avoiding the angle measurement errors introduced by this. The rotating component integrates the mirror and the right-angle prism into a single unit and rotates around a central axis collinear with the laser axis, allowing the second beam to complete a 360-degree full-circumference sweep on the angle disk, extending the measurement range from a limited angle to full coverage of 0-360 degrees. Meanwhile, both horizontal beams are generated by the same highly collimated laser source. After beam splitting, reflection, and refraction, they still retain their original low divergence angle characteristics. Therefore, both beams can be used directly as collimation reference beams, enabling the device to perform multi-directional collimation while completing angle measurement, without the need for additional collimation equipment.

[0048] The above specific embodiments are merely several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A multi-purpose laser angle calibration device based on a beam splitter, characterized in that, include: A base (1) and a laser (2) fixedly mounted on the base (1), the laser (2) being used to emit a laser beam in a vertically upward direction; A beam splitter (3) is disposed on the optical path of the laser (2) at an angle of 45 degrees to the vertical direction. The beam splitter (3) is used to split the laser beam into a first beam reflected in the horizontal direction and a transmitted beam transmitted vertically along the original optical path. A reflector (401) is disposed at a 60-degree angle to the vertical direction on the transmitted light path to reflect the transmitted light beam into a reflected light beam at a 60-degree angle to the vertical direction. A right-angled triangular prism (402) has its inclined surface as the incident surface disposed on the reflected light path to refract the reflected light beam into a second light beam that propagates in the horizontal direction, and the second light beam and the first light beam are located on the same horizontal plane; An angle disk (5) is fixedly installed on the base (1) and located in the same horizontal plane. The angle disk (5) has 360-degree continuous scale and is equipped with a horizontal level and a vertical level (6). Rotating component (7), the reflector (401) and the right-angle prism (402) are fixedly connected to the rotating component (7); The central shaft (8) is arranged collinearly with the emission axis of the laser (2), and the rotating component (7) is rotatably engaged with the base (1) through the central shaft (8); The rotating component (7) is used to rotate 360 ​​degrees around the central axis (8) to drive the second beam to sweep across the angle disk (5).

2. The multi-purpose laser angle calibration device based on a beam splitter according to claim 1, characterized in that, The beam splitter (3) is a semi-transparent and semi-reflective beam splitter with a beam splitting ratio of 1:

1.

3. The multi-purpose laser angle calibration device based on a beam splitter according to claim 1, characterized in that, The reflector (401) is a high-reflectivity aluminum film reflector with a reflectivity of not less than 95%.

4. The multi-purpose laser angle calibration device based on a beam splitter according to claim 1, characterized in that, The right-angle prism (402) has a refractive index of 1.6473, and its inclined plane angle is set so that the reflected beam is strictly horizontal after refraction.

5. A multi-purpose laser angle calibration device based on a beam splitter according to claim 1, characterized in that, The angular disk (5) has a scale accuracy of 0.1 degrees, and the scale lines are evenly distributed along the circumference of the disk.

6. The multi-purpose laser angle calibration device based on a beam splitter according to claim 1, characterized in that, Both the horizontal level and the vertical level (6) are bubble levels, used to calibrate the horizontal state of the angle disk (5).

7. The multi-purpose laser angle calibration device based on a beam splitter according to claim 1, characterized in that, A rolling bearing is provided between the rotating component (7) and the central shaft (8).

8. A multi-purpose laser angle calibration device based on a beam splitter according to claim 1, characterized in that, The laser (2) is a semiconductor laser with an output wavelength of 635nm to 670nm and a laser beam divergence angle ≤1mrad.

9. A multi-purpose laser angle calibration device based on a beam splitter according to claim 1, characterized in that, The base (1) is made of cast iron and is used to provide stable support.

10. A multi-purpose laser angle calibration device based on a beam splitter according to claim 1, characterized in that, The rotating component (7) has a ring or disc-shaped structure, and the reflector (401) and the right-angle prism (402) are fixedly arranged along their circumference.

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